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🔐 Your keys, smarter and safer—anytime, anywhere.
The Master Lock 5441EC Digital Lock Box combines rugged weather resistance with advanced Bluetooth connectivity, allowing professional users to securely store and share keys via a smartphone app. Ideal for property managers, vacation rentals, and remote access control, it offers customizable keypad codes, real-time monitoring, and seamless integration with enterprise platforms, all housed in a compact, durable zinc body.























| ASIN | B071NQ9G3Q |
| Additional Features | Weather Resistant |
| Best Sellers Rank | #14,604 in Office Products ( See Top 100 in Office Products ) #42 in Security Lock Boxes |
| Brand | Master Lock |
| Brand Name | Master Lock |
| Color | Black |
| Connectivity Protocol | Bluetooth, Wi-Fi |
| Control Method | App |
| Controller Type | Android, Vera, iOS |
| Customer Reviews | 4.2 out of 5 stars 987 Reviews |
| Finish Types | Polished |
| Global Trade Identification Number | 00071649293023, 00716492930236 |
| Included Components | Lock box, mounting hardware |
| Item Dimensions | 8.1 x 5.3 x 2.1 inches |
| Item Type Name | Electronic Wall Mount Lock Box with Personal Use Software Platform |
| Item Weight | 1.18 Kilograms |
| Item dimensions L x W x H | 8.1 x 5.3 x 2.1 inches |
| Lock Type | Electronic, Key |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 5441EC |
| Manufacturer Warranty Description | Limited One Year Warranty |
| Material | Zinc |
| Material Type | Zinc |
| Model Name | 5441EC |
| Model Number | 5441ECMX |
| Number of Pieces | 1 |
| Recommended Uses For Product | Indoor or outdoor key and access card storage, vacation rental properties, unmanned remote locations, real estate, and key management Recommended Uses For Product Indoor or outdoor key and access card storage, vacation rental properties, unmanned remote locations, real estate, and key management See more |
| Shape | Rectangular |
| Smart Home Compatibility | Smart Home Compatible |
| Special Feature | Weather Resistant |
| Style Name | Wall Mount |
| UPC | 071649293023 |
| Unit Count | 1.0 Count |
O**E
Great experience
Great product, very sturdy and safe, the app takes a bit of time to understand, but my wife is smarter than me, so no problem! Super convenient not to have to key codes, works really well. Thank you.
E**E
Good Box that Seems to Work Well
I bought this key safe box for my 91 yo father who has lost his house keys twice in the last 2 months. I figured that putting a key in the box outside his door was the best way to ensure that he'd never lock himself out. From the moment I received the box, I was impressed with it. It is heavy and has Bluetooth connectivity that allows it to be programmed from the Master Lock app. Plus you can download access logs to see exactly who and when used it. It can allow for several (I think up to 5 or 7) different access codes that can be personalized and assigned to different people allowing each person their own code and the ability to use their own phone to unlock the box via Bluetooth. It has lots of customization options and works better than I expected. The lighted keypad is a easy to see; the buttons are big and sound a tone and blink when you push them; and the ability to create long or short PINs is a plus. It feels sturdy and I think it would keep whatever you put inside it safe. I do have a couple constructive comments though... First, to open it, you have to grab it from both sides and pull on the flared edges of the door which folds down to open it. Though not a big deal, this would seem kind hard for someone with grip issues. I assume it's built like this so you can't easily take a pry bar to the key safe, which I understand, but it also makes it a little harder to use for people with disabilities or the elderly... Or if it got wet, it might just be a little hard to open for a regular person if it got slippery. Maybe if the door popped open slightly when disarmed, that would be helpful and make opening the door a little easier. Lastly, I have more of an installation tip than a criticism... maybe a criticism of the directions. When you install the Master Lock app and assign phone privileges to the app, make sure that you set the privileges for the app to access your phone's Bluetooth all of the time, not just when the app is running. I know this sounds strange, but I had all sorts of connectivity issues with the app communicating with the box when the app only had privileges when the app was on. The app would recognize the box but it wouldn't update it consistently with the new passcodes. It would download the access log, but I sometimes had a problem unlocking the box using the app. The app would see the key safe, but didn't seem to stay connected to it. The BT connectivity was very shoddy until I changed the apps privileges. Once I did that, the app recognized the box consistently and worked as designed. Unfortunately, I don't remember seeing anything in the directions about this tidbit, and there's no troubleshooting section in the included fold out directions to help you. The directions are poor and basic at best and barely helped you through the install process. Maybe if I had known how to set the app's permissions from the directions, my comments would be different, but unfortunately, that tidbit of info isn't there and so it tainted my experience until I figured it out. It was so bad I even considered returning the key safe as defective. Luckily I installed the app on my Android phone and noticed the "allow use all the time" privilege that I didn't see as a choice so I didn't select it the first time I installed the app on my Dad's Android phone. (My Dad has a Motorola phone, and I have a Samsung). Once I went into the app's privileges and fixed it, all the issues I had went away. Needless to say, it's working now and I think it'll provide the security that my Dad needs.
G**L
Great Lock!
I’m so grateful for this lock. We use it onsite for our condo community for vendors to access the clubhouse & pool. Without having to get someone to come down and let them in. It’s easy to install and use, you can unlock it with your iPhone, a code, or a custom code. You can see who accessed it last and who is tampering with it. Our community manager lives two hours away from the condo community and he’s still able to access it from his and provide a temp or custome pass code. Thank you again
G**N
Ruined by a cheap piece of plastic
Updated review - I fixed this issue myself with a specialized set of drill driver bits. I reached out to Master lock requesting a replacement and they were also responsive. Fixing my review in response (but leaving original) ------------ This product was pretty neat and it satisfied my needs as an STR host, right up until this piece of plastic in the bottom of the box fell out... and then suddenly the lock became a useless brick. It was weird because the box suddenly stopped locking and I could not figure out why. All the lights worked. The app, and everything seemed normal. But it turns out this little piece of plastic is crucial for pressing the button to activate the lock - and without it, the lock will not under any circumstances lock EVEN IF YOU USE THE APP. Making it A TOTALLY USELESS BRICK. The plastic didn't even break. It just fell out somehow during use. And somehow because of the design it's absolutely impossible to put it back into the box. I took all the screws out, used a drill hammer and several screwdrivers for levers trying to force the slots back together, but just examining the design it really doesn't look possible for a person to put it back in. I don't know how it fell out in the first place, seems to be a design flaw. But now that it's out, the lock has become a $150 paper weight.
B**N
Works Great When It Is New
I have purchased 2 of the 5441EC's and both have eventually broken on me with the pin issue other people have written about. The first box lasted more than 3 years with it being unlocked and locked at least twice every day. Finally, the pin broke and it would not lock or if I was able to lock it, it would not open. The second one just broke on me with the exact same issue about 10 days before the 1-year warranty period is up. I am hoping Master Lock is going to replace it but I am still waiting to hear back from them on that. Before reading these reviews, I had no idea there was a YouTube video demonstrating how to break into it. I actually managed to figure it out myself in less than 5 minutes. That's not good. If using this for house keys, I would not use it without an alarm system as a backup in case someone broke into the box, got the keys and unlocked the door to the house. The reason I am going to try another replacement, which will be my 3rd one, is that I need a record of who unlocks and lock the box each day and at what time. This is the only solution I have found that provides that information. It is a nice product to have when it works but I would never rely on this for security. You just have to hope that anyone who happens to see it would not know how to break into it or they just would not want take the time trying to get it off of the wall so they could remove the cover and break into it. I will update if Master Lock gives me any trouble getting a replacement sent to me under warranty. They already decided to close my support case without checking to see if my issue was resolved.
A**Y
Works Flawlessly!
We use this to hand out a key to a gated cave. Has worked flawlessly for 6 months on a single battery. Would highly recommend this product to someone who effectively needs to send out unique lockbox codes but does not have wifi available. Essentially the codes "exist" on this device always. The app on your phone just tells you what the code is for any given day/time. I believe the code is valid for 4 hour blocks of time. Very clever design.
S**Y
Simple to Install, Looks Extremely sturdy
This seems to be a very secure box. It is hard to grab onto to try to leverage off the wall. I found the app quite intuitive. I only have two suggestions. The product should come with instructions on which app to install. There is an enterprise app, and a home app. The former fills up the screen and you have to scroll to discover the second one. I recommend using longer screws. After penetrating the siding or stucco of your house, there is about an inch left to penetrate studs. I substituted 2 inch screws.
S**T
Extremely reliable in spotty wireless and internet areas
I love the unit. Use it for my VRBO rental in Tahoe that has limited Wireless access and internet can be spotty. The unit is extremely reliable. I’ve been using it for 8 months now and no guest has ever had an issue...that is success in my book. But there are quirks that originally were not what I expected. This quirks could be unacceptable based on your situation: . I do not ask guests to download the APP. It isn’t very good, people don’t want to install APPs on their phone for one time use and remember a username/password, and I’m not sure how reliable it is in areas that have poor wireless access - I tested the APP for opening the box and it didn’t always work (it is likely due to my home not having good wireless service near the box). This means that Instead of using their phone to open the box anytime during their stay, I give the guest temporary codes to open the box to get and return keys. . The temporary codes are basically valid for 8 hour increments. Some people may not like that, but for my home, this unit was the best option. And I find the 8 hour range wasn’t as limiting as I thought. For checkin and checkout, I just give them different temporary codes based on their arrival/departure time range. Again, I’ve been doing this for 8 months now and it works for me. In reality, reliability trumps all in my book!
R**!
Excelente
Excelente solución, cuando necesitas que varias personas tengan acceso, puedes asignarle los códigos de manera independiente y por tiempo, un excelente excelente producto
A**M
Quick and easy to install
...the only minor glitch was a firmware update to the lock. I discovered the the Bluetooth connection from my smartphone actually worked better six feet from the lock than right up against it. Another issue is that the lock will auto-lock when the door is closed, but it will also auto-lock if the door is "almost" closed. If you're not quick enough to totally close the door before it auto-locks then you have to unlock it before you can totally close the door. Other than that, the lock is easy to configure, install on a wall and to use.
M**L
Solid build and smart software
High quality design and build. Love the illuminated keypad and phone notifications
J**N
Going strong after 2 years!
I bought this 2 years ago for care workers to access the house key so that they can come in and look after my 95 year old mother-in-law who can't come to the door. No issues. Never had to even change the batteries yet!
R**O
Excelente producto, pero le cambian constantemente de precio
Me gusta mucho el producto, quise comprar otro y cada semana que me meto a revisar le cambian el precio. Varía aprox. $1,000.00 y ya se me hace muy caro
Trustpilot
3 weeks ago
3 weeks ago