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Master Lock

Bluetooth Smart Padlocks

The Master Lock No. 4400ENT & 4401LHENT Bluetooth® Padlock features a 1-29/32in (4400) or 2-7/32in (4401) wide metal body for durability.

The 9/32in (4400) or 11/32in (4401) diameter shackle offers 7/8in (4400) to 2in (4401) of vertical clearance and is made  of boron alloy, offering maximum resistance to cutting and sawing.

The Master Lock Vault Enterprise system is designed to support Many Locks and Many Users with unmatched security, simplicity and accountability.

Administrators control individual or system-wide lock access with our convenient web interface, while users enjoy simple, secure access to assigned locks or lock boxes.

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Master Lock Model No. 4401LHENT
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Product Features:

Includes Master Lock Vault Enterprise IOS and Android app, and web interface, designed for business applications working with many locks and many users.

Use your smartphone to open and manage your lock with the Master Lock Vault Enterprise app

No keys to lose, no combinations to forget. No unauthorized key duplication.

Backup access using directional code on lock keypad

Share access with others - temporary or permanent

Easily monitor access with robust data and audit trails

Low battery notification & reminder on padlock and in app

Battery jump allows for temporary access if battery dies while locked

Product Specifications:


Ideal for indoor use

Locker mode setting allows for storage inside a locker

Compact footprint fits most lockers

Comes with easy to replace CR2450 battery


Ideal for outdoor use

2 piece weather cover for maxium outdoor protection

Injection molded body cover, elastomer shackle seal and weather protected internal components.

Comes with easy to replace CR2 battery


Personal use, supporting up to 10 locks


Includes Master Lock Vault Enterprise App

Administrators can control individual or system-wide lock access with convenient web interface.

Available Products:

A = Case Width / B = Shackle Clearance / C = Shackle Diameter

4400D - A: 1-29/32" - B: 7/8" - C: 9/32"

4401D LH - A: 2-7/32" - B: 2" - C: 11/32"

4401LHENT - A: 2-7/32" - B: 2" - C: 11/32"