---
product_id: 22852370
title: "Master Lock Padlock, Indoor Personal Use Bluetooth Lock, 1-29/32 in. Wide, 4400D"
brand: "master lock"
price: "1137.41 DT"
currency: TND
in_stock: true
reviews_count: 12
category: "Master Lock"
url: https://www.desertcart.tn/products/22852370-master-lock-padlock-indoor-personal-use-bluetooth-lock-1-29
store_origin: TN
region: Tunisia
---

# Smartphone & keypad dual access Military-grade Bluetooth encryption Boron carbide shackle for max strength Master Lock Padlock, Indoor Personal Use Bluetooth Lock, 1-29/32 in. Wide, 4400D

**Brand:** master lock
**Price:** 1137.41 DT
**Availability:** ✅ In Stock

## Summary

> 🔐 Elevate your locker game with smart, sleek security that keeps you ahead of the pack.

## Quick Answers

- **What is this?** Master Lock Padlock, Indoor Personal Use Bluetooth Lock, 1-29/32 in. Wide, 4400D by master lock
- **How much does it cost?** 1137.41 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/22852370-master-lock-padlock-indoor-personal-use-bluetooth-lock-1-29)

## Best For

- master lock enthusiasts

## Why This Product

- Trusted master lock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Withstand:** Rugged metal body with boron carbide shackle and anti-shim tech ensures your valuables stay safe indoors.
- • **Locker Mode Convenience:** Keep your phone inside the locker with disabled Bluetooth mode—perfect for gym or school use.
- • **Seamless Keyless Security:** Unlock instantly via Bluetooth or keypad—no fumbling for keys ever again.
- • **Share Access, Stay Connected:** Grant temporary or permanent entry remotely and monitor activity through the Master Lock Vault Home app.
- • **Smart Alerts, Zero Surprises:** Receive tamper and low-battery notifications so you’re always in control.

## Overview

The Master Lock 4400D Indoor Bluetooth Padlock combines military-grade encryption with a durable boron carbide shackle and a compact design ideal for school, gym, or office lockers. It offers dual unlocking options via smartphone Bluetooth or keypad, supports sharing access through a dedicated app, and features tamper and battery alerts—all without needing Wi-Fi. Designed for personal use, it supports up to 10 locks and ensures robust indoor security with modern convenience.

## Description

Master Lock Padlock, Indoor Personal Use Bluetooth Lock, 1-29/32 in. Wide, 4400D

Review: Modern interpretation of a gym locker padlock - An excellent lock from a name I trust. It's not laden with features (it is, after all, only a padlock), but it is a solid performer. Works as advertised, has no problems functioning in a steamy gym locker room environment. Unfortunately, I pretty much use this padlock exclusively in Locker mode since I have it on my gym locker. That means I am always entering the code on the dial instead of benefiting from the Bluetooth proximity activation feature (since my phone is always in my locker when I use this lock). That said, it does it's job well and has given me no problems or issues at all. One small bug: if you close and then quickly open the lock again before the lock's mechanism clicks, it will remain unlocked. Even if you close it, it will still be openable. The only way to make it lock properly again is to enter the code on the front of the lock (like you are unlocking it), and let the lock unlock. Then lock it again and do not attempt to open it until after the mechanism clicks. I can repeat this behavior, so it does seem to be some kind of bug, but at least it is easy to resolve without any complex steps to follow.
Review: Nice lock but pricey - Love the lock but seems that it is slow to unlock and burns through the battery quickly

## Features

- For indoor use; compact design is best used for school, employee, athletic, and indoor storage lockers
- Use your smartphone to unlock Bluetooth padlock, or enter directional code on lock keypad for easy backup entry when your smartphone isn't present; Disabled mode setting allows for smartphone storage inside a locker (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 Home app for Android and iOS. Designed for personal use, supporting up to 10 locks
- Padlock includes metal body construction, boron carbide shackle, and anti-shim locking mechanism for improved strength and security; Plus military-grade Bluetooth authentication and encryption
- 1-29/32 in. wide lock body; 9/32 in. diameter shackle with 7/8 in. length, 13/16 in. width

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01A65T96E |
| Additional Features | Keyless |
| Best Sellers Rank | #306,723 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #589 in Combination Locks |
| Brand Name | Master Lock |
| Color | Silver and Black |
| Connectivity Protocol | Bluetooth, Wi-Fi |
| Control Method | App |
| Controller Type | Android, Vera, iOS |
| Customer Reviews | 3.6 3.6 out of 5 stars (305) |
| Finish Types | Polished |
| Global Trade Identification Number | 00071649266591 |
| Included Components | Master Lock - 4400EC |
| Item Dimensions | 3.2 x 2 x 1.4 inches |
| Item Type Name | Master Lock - 4400EC |
| Item Weight | 0.23 Kilograms |
| Lock Type | Keypad |
| Manufacturer | Master Lock Store |
| Manufacturer Part Number | Master Lock - 4400EC |
| Manufacturer Warranty Description | Limited 1 Year Warranty |
| Material Type | Metal |
| Model Name | Master Lock - 4400EC |
| Model Number | 4400DMX |
| Number of Pieces | 1 |
| Recommended Uses For Product | Security |
| Shape | Rectangular |
| Smart Home Compatibility | Not Smart Home Compatible |
| Style Name | Indoor |
| UPC | 071649266591 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Master Lock
- **Item dimensions L x W x H:** 3.2 x 2 x 1.4 inches
- **Lock Type:** Keypad
- **Material:** Metal
- **Special Feature:** Keyless

## Images

![Master Lock Padlock, Indoor Personal Use Bluetooth Lock, 1-29/32 in. Wide, 4400D - Image 1](https://m.media-amazon.com/images/I/51qEDqPoYYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Modern interpretation of a gym locker padlock
*by M***F on June 11, 2017*

An excellent lock from a name I trust. It's not laden with features (it is, after all, only a padlock), but it is a solid performer. Works as advertised, has no problems functioning in a steamy gym locker room environment. Unfortunately, I pretty much use this padlock exclusively in Locker mode since I have it on my gym locker. That means I am always entering the code on the dial instead of benefiting from the Bluetooth proximity activation feature (since my phone is always in my locker when I use this lock). That said, it does it's job well and has given me no problems or issues at all. One small bug: if you close and then quickly open the lock again before the lock's mechanism clicks, it will remain unlocked. Even if you close it, it will still be openable. The only way to make it lock properly again is to enter the code on the front of the lock (like you are unlocking it), and let the lock unlock. Then lock it again and do not attempt to open it until after the mechanism clicks. I can repeat this behavior, so it does seem to be some kind of bug, but at least it is easy to resolve without any complex steps to follow.

### ⭐⭐⭐ Nice lock but pricey
*by C***Y on April 11, 2026*

Love the lock but seems that it is slow to unlock and burns through the battery quickly

### ⭐⭐⭐⭐ Trade off’s still make this a good lock overall.
*by F***A on December 8, 2019*

Pretty good lock. My only gripe is the app. Not as reliable as it could be. And be prepared for frustration when your iPhone updates its firmware and renders the Masterlock App unusable until Masterlock does its own update. Make a copy of your manual passcodes and store them on your preferred device in those rare instances that the Masterlock App will not work. At least you’ll be able to get the lock to open and get on with your day. Other than that, it’s made a huge difference getting in and out of my locker at work and not having to search around for lost/missing keys. Almost everyone these days has that one thing that life dictates is a must carry and that’s the cell phone. Perfect but for a few app snags every now and then.

## Frequently Bought Together

- Master Lock Padlock, Indoor Personal Use Bluetooth Lock, 1-29/32 in. Wide, 4400D
- Master Lock Digital Lock Box for Keys with Code, Electronic Wall Mount Key Safe with Bluetooth Connection to iOS/Android App and Sharable Keypad Codes, 3-1/4 Inches Wide, ‎5441EC

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**Shop now:** [https://www.desertcart.tn/products/22852370-master-lock-padlock-indoor-personal-use-bluetooth-lock-1-29](https://www.desertcart.tn/products/22852370-master-lock-padlock-indoor-personal-use-bluetooth-lock-1-29)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-09*