Master Lock Padlock, Bluetooth Lock, 2-7/32 in. Wide, 4401D (Pack of 2)

(6 customer reviews)
BrandMaster Lock
Lock TypeKeypad Lock
Item Dimensions LxWxH7.25 x 4.88 x 1.31 inches
  • PADLOCK APPLICATION: For outdoor use, all-weather lock is best used for residential gates, sheds, garages, outdoor storage lockers and tool chests
  • EASE OF USE: Use your smartphone to unlock Bluetooth padlock, or enter directional code on lock keypad for easy backup entry when your smartphone isn’t present
  • SHARED ACCESS: Share temporary or permanent access via Bluetooth or keypad code with invited guests or coworkers, monitor activity, and receive tamper and low-battery alerts all from your free Master Lock Vault eLocks app for Android and iOS
  • DURABLE DESIGN: 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
  • DIMENSIONS: 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, Includes two locks
SKU: B071Z3JJTC Category:
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Device detailed description

The Master Lock No. 4401D Bluetooth Padlock features a 2-7/32 in. (56mm) wide metal body for durability. The 11/32 in. (9mm) diameter shackle offers 2 in. (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 can trust.

Features and specification

Brand Smart devices brand

Interface Smart device connectivity interface

Manufacturer Smart device manufacturer


Color Available colors

Material Smart home device material

Item Package Quantity


Batteries Included?

Batteries Required?

Product Dimensions

‎7.25 x 4.88 x 1.31 inches




Controller Type


Included Components

‎Padlocks, Hardware, Door Knobs & Lock Sets

Item Weight

Control Method

Lock Type

Frequently asked question

how close you have to be to unlock the lock

You need to press the key pad once using the bluetooth phone app recognition. So unless you are rubber man you need to be close

6 reviews for Master Lock Padlock, Bluetooth Lock, 2-7/32 in. Wide, 4401D (Pack of 2)


57 %


57 %


57 %

Reviewed by 0 customer(s)

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  • Anonymous

    Difficult to open

    Difficult to open. Hard to time window it stays unlocked.

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  • Anonymous

    Waiting for 1 to get fixed

    I like the locks but one of them shows a dead battery which I replaced but it did not fix it which is the reason for the 3 stars. It took 6 days to get and one is broken. I have not heard back from customer service on the fix?

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  • Anonymous

    Please purchase an Enterprise upgrade for each pending lock to complete its activation.

    After buying 2 new locks, and one replacement due to product failure, now the NEW APP/Web Master Lock Vault Enterprise, you have to get a $25 Upgrade before the web based platform for what the lock needs to operate? What kind of extortion is this? The lock isn’t expensive enough off the shelf? Basically Blackmailed to pay an additional $25 fee per Brand New Lock just to use it. I’m Sorry that’s flat out wrong!

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  • Anonymous

    Don't buy it until you confirm App is updated

    Bought these locks so we could quit changing locks out when an employee got fired or quit. I was under the assumption that I could allow access to all employees and revoke individual people as needed. That is not the case at all. The bluetooth function works fine, but only the person who registered the lock has bluetooth access. If you want to allow other people to access the lock, you have to send them a text message with manual operations and there are only 4 hour blocks it can be used ( 5am-9am, 9am-1pm, etc). These blocks are preset too. You are not allowed to manually give access at your preferred times. Example: If you give access to the lock at 5am-9am you must send out access to lock before 5am or that person will have to wait until the next block (9am-1pm) before they can access it. So say you don’t get up until 5am and you haven’t sent the text and your people start work at 7am. The way this thing is set up, the first time they could open the lock would be 9am.
    Contacted tech support and they got back to me telling me I could allow access by giving permissions in the app. Told me to go into ‘manage lock’ menu and click on ‘guest’. Problem is, there is no ‘guest’ to click on. I brought that to their attention and have not heard from them since.
    Buy a Noke lock. I received their version last week and it is much more user friendly. Much better performance if you are looking for customize access.

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  • Anonymous

    Great product

    I bought these for the gym. Although I haven’t had a chance to use them yet I’ve played with them around the house. These will work perfectly for my application.

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  • Anonymous

    Latest iOS update seems great!

    Initially I was not impressed with the Phone App on my iPhone. But support was very fast and it seems the app got updated from my comment. Seems well thought out and I like it now. It says it’s only for the iPhone, not the iPad. Why?
    But, I’ll be buying more and taking some of them to my place in Thailand as well as using it in Texas.

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