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Master Lock Padlock, Outdoor Personal Use Bluetooth Lock, 2-7/32 in. Wide, 4401DLH

3.7 3.7 out of 5 stars 370 ratings

$124.99 with 23 percent savings
List Price: $163.06

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Purchase options and add-ons

Brand Master Lock
Special Feature Keyless, Alarm
Lock Type Keypad
Item dimensions L x W x H 5.29 x 2.22 x 1.1 inches
Material Metal

About this item

  • For indoor and outdoor use; all-weather lock is best used for residential gates, sheds, garages, outdoor storage lockers and tool chests
  • Use your smartphone to unlock Bluetooth padlock, or enter directional code on lock keypad for easy backup entry when your smartphone isn't present (Wi-Fi connection is not required to operate)
  • Share temporary or permanent access via Bluetooth or keypad code with invited guests , monitor activity, and receive tamper and low-battery alerts all from your free Master Lock vault elocks app for Android and iOS. Designed for personal use, supporting up to 10 locks
  • Padlock includes a 2-piece weather cover, metal body construction, boron Carbide shackle, and anti-shim locking mechanism for improved strength, security, and weather resistance; Plus military-grade Bluetooth authentication and encryption
  • 2-7/32 in. wide lock body; 11/32 in. diameter shackle with 2 in. length, 15/16 in. width; extended length shackle for application flexibility; For answers to frequently asked questions, 2018 firmware updates, troubleshooting, and technical support, see document titled User Guide in the technical specifications section of this page
See more product details

Customer ratings by feature

Durability
3.7 3.7
Weatherproof
3.6 3.6
Sturdiness
3.6 3.6
Easy to use
3.5 3.5

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From the manufacturer

outdoor bluetooth
outdoor, phone, app, open

Access Remastered

  • Free Master Lock Vault Home app is designed for personal use, supporting up to 10 locks
  • Keyless convenience: No need to worry over lost keys or forgotten combinations
  • Durable full body all-weather cover protects internal lock components
  • Gain greater flexibility and control: The Bluetooth padlock that allows you to share temporary or permanent access with guests or coworkers
  • Monitor access history and receive tamper alerts
  • Simple backup access using directional code on lock keypad
  • Easy to replace, readily available CR2 batteries (included)
  • Receive low battery notifications on padlock and in app
  • Battery jump feature provides temporary power if battery dies while lock is locked
  • Master Lock Bluetooth products are authorized to operate in the following countries: United States, Canada, Mexico, the European Union, Australia, New Zealand, Brazil, Chile, South Africa, Thailand, & Vietnam

Key Features

Share Access

bluetooth padlock

bluetooth padlock

Share Access

Schedule guest access via app or share temporary access via manual codes.

Monitor Activity

View lock history, including registration, guest addition/deletion, and unlock/open/relock activity.

Low Battery Alerts

Padlock and app notifications.

Master Lock For Everything Worth Protecting

Product guides and documents

Product Description

The Master Lock 4401DLH Bluetooth Padlock features a 2-7/32in (56mm) wide metal body for durability. The 11/32in (9mm) diameter shackle offers 2in (51mm) vertical clearance and is made of boron alloy, offering maximum resistance to cutting and sawing. The smartphone/app interface offers speed, ease of use, & greater control with the ability to share access, with keyless convenience. The locking mechanism features anti-shim technology, offering maximum security. The 1 Year Limited Warranty provides peace of mind from a brand you know and can trust.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF ]

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Master Lock Padlock, Outdoor Personal Use Bluetooth Lock, 2-7/32 in. Wide, 4401DLH

Master Lock Padlock, Outdoor Personal Use Bluetooth Lock, 2-7/32 in. Wide, 4401DLH


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Master Lock Padlock, Outdoor Personal Use Bluetooth Lock, 2-7/32 in. Wide, 4401DLH
Master Lock Padlock, Outdoor Personal Use Bluetooth Lock, 2-7/32 in. Wide, 4401DLH
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Price$126.94$69.99$38.99$58.99$15.99$69.99
Delivery
Get it as soon as Monday, May 20
Get it as soon as Monday, May 20
Get it as soon as Monday, May 20
Get it as soon as Monday, May 20
Get it as soon as Monday, May 20
Get it as soon as Monday, May 20
Customer Ratings
Weatherproof
3.6
4.5
4.4
3.8
4.2
4.8
Easy to use
3.5
4.5
3.8
4.1
4.5
Fingerprint reader
4.6
4.8
3.7
4.6
Sturdiness
3.6
3.9
3.5
Value for money
2.0
4.5
3.6
Sold By
PLEXSUPPLY.
YingTong Software
YingTong Software
eLinkSmart US
Diyife-Direct
eLinkSmart US
lock type
Keypad
Smart
Biometric
Fingerprint, Smart, Key, Biometric
Heavy Duty Outdoor Padlock
Biometric
number of items
1
1
1
1
1
1
material
Metal
Stainless Steel, Zinc
Stainless steel lock beam, Zinc alloy lock body
Alloy Steel, Zinc, Stainless Steel
Stainless Steel, Alloy
Alloy Steel, Zinc, Stainless Steel
shape
Square
Square
Rectangular
finish type
Polished
Frosted
Polished
Polished
weight
0.78 pounds
0.7 pounds
0.3 pounds
0.73 pounds
0.9 pounds

Customer reviews

3.7 out of 5 stars
3.7 out of 5
370 global ratings

Customers say

Customers have negative opinions about the battery life of the lock. They say that the battery only lasts about a month. They are also disappointed with the ease of opening. Opinions are mixed on performance, quality, ease of use, and value.

AI-generated from the text of customer reviews

115 customers mention43 positive72 negative

Customers are mixed about the performance of the lock. Some mention that it works really well, while others say that it failed after two months. They also say that the app feature is unreliable and the lock is not dependable.

"...It struggles to connect to the app on a good day , the locking mechanism often fails to engage and it has left us not only frustrated but has..." Read more

"...Aside from that, looks and feels like a quality product and works as advertised. I have been using it for two days so far...." Read more

"...These do not hold up in any type of weather. Until there are improvements stay away from all Bluetooth padlocks. Update...." Read more

"...I gave it a 4-star because the app could be better. While it works great on my phone, I find that sharing access (like with my wife) so others can..." Read more

115 customers mention51 positive64 negative

Customers have mixed opinions about the quality of the lock. Some find it to be an excellent, sturdy lock with well thought out features. However, others say that the locking mechanism often fails to engage and the app will say the lock is open even though it's locked.

"...struggles to connect to the app on a good day , the locking mechanism often fails to engage and it has left us not only frustrated but has..." Read more

"...Aside from that, looks and feels like a quality product and works as advertised. I have been using it for two days so far...." Read more

"...App will say the lock is open (even though it's locked) and not let you open it.Hasp will get stuck turned all the way away from the lock...." Read more

"...It appears to respond quicker to the phone on unlock and has a nice large icon on the lock to indicate interaction and green for it's unlocked...." Read more

54 customers mention31 positive23 negative

Customers are mixed about the ease of use of the lock. Some mention that it's easy to use and set up, while others say that it takes quite some time, the instructions are lacking, and the app could be more intuitive.

"Easy-ish setup through the IOS app and the lock is very sturdy...." Read more

"...The app could be more intuitive and I still haven't found how to revoke or modify temporary access and it should be made more clear that IF the..." Read more

"...We find these easy enough to learn to use. Our customers seem to grasp the instructions on how to use these pretty quickly...." Read more

"Bought another few more! Was a great product, easy to use, functional, get the job done~! Great one!" Read more

31 customers mention12 positive19 negative

Customers are mixed about the value of the lock. Some mention it's a great buy, valuable, and strong, while others say it'll never be worth the price.

"...An expensive piece of decoration. I would not recommend, 1 x star cos the concept is great...." Read more

"...In addition to that I also think that it has the best price in its class...." Read more

"A supremely bad product. I read some reviews, some said it sucked, other said it didn't, it fit the bill perfectly so I bought it...." Read more

"Good product" Read more

19 customers mention2 positive17 negative

Customers are dissatisfied with the battery life of the lock. They mention that the battery only lasts about a month, it goes through batteries like crazy, and that it has an internal battery power fault.

"...There is nothing wrong with the battery but sometimes the lights just stop working...." Read more

"...you need to have stock in a battery company, the batteries only last about a month of very little use...." Read more

"...Battery life is terrible. I've had to replace the CR2 batteries almost monthly...." Read more

"...But, all of a sudden the lock stopped working. The battery was not dead, but it would not open. After many many attempts, it finally opened...." Read more

14 customers mention3 positive11 negative

Customers find the lock difficult to open. They mention that they have to physically pull it open, which takes quite a bit of effort.

"...does not pop open when you unlock with your phone, you have to physically pull it open, which takes quite a bit of force...." Read more

"...It is not dependable. It never opens on the first try. There are two ways to open the lock...." Read more

"...is here on my kitchen table and I try the key pad every day and it will not open. It has a new battery in it, but it will not open...." Read more

"...The software makes it easy to turn access off or on for each customer or contractor...." Read more

8 customers mention2 positive6 negative

Customers are dissatisfied with the fit of the lock. They mention that the shackle is too large to fit the area they intended to use it in, the hasp is quite thick, and it won't fit on standard lockers in schools and gyms. It also doesn't even fit in the latch for their gate.

"...Also will not fit on standard lockers in schools and gyms." Read more

"...It's so serious that it doesn't even fit in the latch for my gate! So, now I have to look for a new latch to go with my nice new lock!" Read more

"...keys or fixed combinations that I could not change so this lock fit the need very well. It has plenty of room on the locking loop and is waterproof...." Read more

"Works well, the shackle was much too large for what I had intended to use it for, purchased the smaller version for inside use only." Read more

4 customers mention0 positive4 negative

Customers are not satisfied with the safety of the lock. They mention that it compromises their safety and security, and that it does not provide any warning or yellow light.

"...engage and it has left us not only frustrated but has compromised our safety and security...." Read more

"...Now 2 of them are not working. NOT SAFE! if I needed to get out my gate or in i cant. Had to take the gate brackets apart to bypass the locks...." Read more

"...Sometimes it works. Sometimes it doesn’t. When it needs updating it doesn’t warn you. Sometimes it takes a long time to open...." Read more

"...I had it in use for 10 days. No warning , no yellow light saying the battery is dying. Nothing. Blue light this morning and locked it...." Read more

These locks fail regularly, but the concept is good
3 Stars
These locks fail regularly, but the concept is good
The premise behind these locks is perfect for my business. We have three gates that customers and contractors use to get into our facility. These locks allow us to give everyone 24-hour access while tracking who is and has been inside. The software makes it easy to turn access off or on for each customer or contractor. The ability to use an external 9-volt battery to gain access when the internal battery dies is very useful as well. We find these easy enough to learn to use. Our customers seem to grasp the instructions on how to use these pretty quickly.For these reasons we choose to use these locks. However, despite having only three gates to lock, we have purchased we over thirty of these locks in the last year. These locks fail regularly. I've included a picture of some of our failed locks. I keep a "lock Log" to keep track of how long they last and where we've deployed them (some gates are used much more than others - turns out that frequency of opening/closing is not related to how long the lock lasts). Our locks have lasted from as little as 5 days to 3 months. So even our longest lasting lock leaves a lot to be desired from a durability standpoint. I would expect to get at least a year of service, maybe even multiple years.Failures we've noticed:Lock will turn green but not "click" and open.Lock will turn green, click but not open.App will say the lock is open (even though it's locked) and not let you open it.Hasp will get stuck turned all the way away from the lock. Totally immobile hasp. We call this "Back Death."Lock will act like it has a dead battery but even using the external battery will not wake up.Locks sometimes get stuck locked. We use a cut-off wheel on a 4-inch grinder to open them.After it rains, the locks tend to act up more. Lately we spray them with wd-40 after the rain. Seems to help.Sometimes a new lock's battery will die in two weeks. Other times it will last until the lock stops working from something else.For a while we could buy these at the big box stores. When they failed we had good luck exchanging them for a new lock. The big box stores haven't had them in stock for about six months now, so we are buying online. That makes them harder to return/exchange. Plus, since we have to have a lock for our gates, and we have to be able to provide 24 hour access, we purchase locks to keep in inventory ready to be deployed when one fails. Sometimes the locks in inventory sit for 30 days or more before they are put into service. That also makes them harder to return.We still use though because we haven't found a comparable product, and the locks still pay for themselves in our business.The price has ranged from $80.00 to $150.00 depending on the source and the availability. Big box stores were the cheapest.Masterlock is truly on to a great concept here, but there needs to be some tweaking in the functionality for these locks to realize their full potential.
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Top reviews from the United States

Reviewed in the United States on March 26, 2017
Easy-ish setup through the IOS app and the lock is very sturdy. The user experience leaves a bit to be desired because the app sends you one code via e-mail and one code via text message at the same time. You will be inclined to enter the code from the text message first but you will be wrong. You have to enter the e-mail code first and then after that it will ask you to enter the code from the text message. Then you have to enter the activation code. The app shows you an image of the box as it appears on the packaging and you will try to click on it several times before you realize that the app wants you to enter the activation code in the textbox above the image and not on the image itself. I bought this to go on a Lifetime shed in my back yard. My only complaint is that it is slightly too long and a little too thick to fit in the narrow holes for my shed. I can get it on with some maneuvering but I would prefer not to have to. Aside from that, looks and feels like a quality product and works as advertised. I have been using it for two days so far. I am giving it 5 stars because I am rating the lock itself and not the usability of the application
I couldn't find a way for my wife to have permanent access to the lock with her own account, so she ended up signing into my account on her phone. This works but is not ideal.
2 people found this helpful
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Reviewed in the United States on February 27, 2019
We use this on the gate to our property. We have been locked in & locked out on multiple occasions. There is nothing wrong with the battery but sometimes the lights just stop working. It struggles to connect to the app on a good day , the locking mechanism often fails to engage and it has left us not only frustrated but has compromised our safety and security. It is so bad I contacted Masterlock to see if I had a genuine product! Despite numerous attempts to contact Masterlock ... crickets. An expensive piece of decoration. I would not recommend, 1 x star cos the concept is great. But something has definitely gone awry in the execution.

UPDATE: Amazon has refunded me, thank you muchly. We have since tried other locks but none as good as the "idea" of this one. I see there are some positive reviews so I am going to try again as buying this locally is TWICE the price. I'm hoping maybe I just got a dud?

UPDATE: I read some more reviews & it seemed to be working for other buyers. So I bought another one. This one didn't play up at all ... just stopped working altogether after about 6 weeks or so. Just had very frustrating online chat with Amazon Customer Service who want me to send it back - I explained it was still attached to a huge heavy gate bolt, sent them a photo to prove. They said that since it is a month past their item return window, the best they can do is 20% of purchase price refund. Masterlock equally useless. Learnt my lesson ...
One person found this helpful
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Reviewed in the United States on February 24, 2017
So far so good. I've had one from another brand that had water issues. We do get heavy rains here. What I like better with this lock is the larger battery. Our gate gets opened 10-20 times a day. The other advertised 6 months battery life only to discover that is only if you use it once or twice a day.
I did make contact with Master Lock about opening during heavy rainfall and if we could use de-icer on it in the winter. They were emphatic about relocking the lock as soon as possible and try to cover the lock from the rain while it is open. Some water "may" collect on the inside. However when locked it is well sealed.

They are to get back to me about the deicer. Regular locks we heat with a torch to open in the Winter after a freezing rain.

The four buttons on front are easier to hit a combo than dits and dahs of undetermined length done by other locks.
It appears to respond quicker to the phone on unlock and has a nice large icon on the lock to indicate interaction and green for it's unlocked.

Of the bluetooth locks I've researched So far this one appears to work best in our situation. A tow yard impound/accident lot.
9 people found this helpful
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Reviewed in the United States on October 22, 2017
Works great. I gave it a 4-star because the app could be better. While it works great on my phone, I find that sharing access (like with my wife) so others can access it via the app on their phone is problematic. She is still unable to access.

**** UPDATED 12/26/2017 ****
Master Lock customer support responded to me after I initiated a support request on their website. They got back to me this morning with troubleshooting instructions. I was able to follow it. Apparently I had to recalibrate the lock (done this before, but did not uninstall the app from my phone) and it worked. Adding 1 star back to rating since customer support was good. It will not get a 5 star unless the app is improved.

**** UPDATED 12/21/2017 ****
I purchased this lock in November 2016. It has been working well, except fort the app. Anyway, I've noticed that lately I have been having to go into locker mode to manually enter the combination to unlock it. I figured it may have been the battery running low, so now that I'm off for the holidays, I decided to tinker with it. I changed the battery and fussed with it as much as I can. It looks like the Bluetooth unit is no longer working and I'm just shy past the 1 year warranty. I'm stuck with using it in locker mode. I'll see if I can get MasterLock to replace it under warranty and will provide an update if they do.
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Jason
5.0 out of 5 stars Five Stars
Reviewed in Canada on March 10, 2018
Works great thanks
BERSAN
5.0 out of 5 stars Excelente calidad y practicidad
Reviewed in Mexico on August 2, 2018
Pusimos este candado en la reja de entrada de la casa reemplazando a un candado con combinación númerica. Estábamos buscando una opción sin llave porque la puerta de la casa tiene una cerradura digital y no tenía sentido tener un candado con llave en la reja. El candado con combinación era muy poco práctico porque lleva mucho tiempo poner la combinación, cuando está oscuro es necessario contar con una luz y se endurece el mecanismo con la lluvia.
El candado Master Lock es muy práctico ya que se empareja con el teléfono y al acercarte se conectan por bluetooth y se abre muy facilmente. A veces le cuesta un poco contectarse al teléfono pero en ese caso es muy sencillo ingresar la clave con el pad, es como un video juego, muchísimo más sencillo y rápido que con una combinación númerica tradicional, aunque la clave sea muy larga.
Además, en la app hay muchas opciones más, asiganr permisos a personas, limitar los permisos por días y horarios, asignar permisos temporarios, etc.
Por último, es de muy buena calidad y resistente al agua, no se oxida ni se comrpomete el funcionamiento. Vivo en una ciudad en la que llueve mucho y era importante que resistiera bien a la humedad porque está en el exterior. Al candado con clave númerica tradicional que teníamos antes se le endureciá el mecanismo cada vez que llovía, a pesar de ser para exterior.
Estoy muy satisfecho con este candado y lo recomiendo. Antes de comprarlo tenía dudas porque había leído algunos comentarios negativos, pero creo que debe ser que a esas personas lamentablemente tuvieron mala suerte. Pasan estas cosas con todos los productos electrómicos. Hay un pequeño margen de productos que pueden presentar fallas. Si me pasara lo cambiaría por otro candado nuevo porque funcionando correctamente es una joya.
8 people found this helpful
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Dylan
1.0 out of 5 stars High hopes met with massive disappointment...
Reviewed in Canada on January 11, 2018
This lock was decent in the summer. It wouldn't connect most of the time so we would just use the code, effectively making it the same as its less expensive counterparts (and I mean at least $60.00 less expensive).

In the winter it just froze shut and became unresponsive. It started in -5 degree Celsius weather, and then permitted the colder it got. I had to pour warm water over it just to unlock it. It's currently on my counter because it's not worth the trouble.

When it works (using a combination): 5/5 stars

App to unlock it via your phone: 1/5 stars

Winter: Completely inoperable.

Verdict: Look elsewhere. I was incredibly disappointed in this product. Master Lock could have and should have done so much better....
2 people found this helpful
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Vicky Minich
5.0 out of 5 stars Love this lock
Reviewed in Canada on November 21, 2017
Love this lock. So easy to use. Too bad it isn't compatible with my husband's iPhone 4 but oh well. It works with my phone
Cristhian Mauricio Guzman Sandoval
4.0 out of 5 stars Practico y cómodo, cumple lo que ofrece.
Reviewed in Mexico on October 29, 2018
Hasta ahora ha funcionado perfectamente, a reserva de cuando la aplicación está abierta en segundo plano y tarda hasta 10 segundos o poco más en abrir, por lo demás cumple excelente con lo que promete, lo usamos un par con el celular y otros con código patrón lo cual evita por lo menos traer llaves. Con la aplicación abierta en pantalla todo fluye sin problema, tal vez una mejora en firmware podría mejorar la velocidad con aplicación en segundo plano en versiones futuras ya que si se actualiza si sale nuevo firmware, de ahí en mas no hay quejas y funciona muy bien a la intemperie.
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