Master Lock 5440ENT

Bluetooth Portable Lock Box

Reviews (2) | Customer Questions (2)


For Business & Real Estate Applications

Realtors new best friend! Remotely control, manage access, and monitor usage for unlimited Bluetooth series lock boxes with the powerful Master Lock Vault Enterprise smartphone app and site. Install this weather-resistant keyless portable lock box anywhere you need key and keycard storage. Integrates with ShowingTime® property showing management tool for realtors, agents and brokers.

In stock

SKU: 5440ENT
Your Current Selections:
  • Large storage capacity portable lock box for keys and access cards
  • Removable shackle for added convenience
  • 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, combinations to forget, or unauthorized key duplication
  • Backup access using numeric code on lock keypad
  • Share access with others – temporary or permanent
  • Easily monitor access with robust data and audit trails
  • Includes mounting hardware for easy installation
  • Low battery notification and reminder on device and in app
  • Comes with easy to replace CR123A battery
  • Weather-resistant 3 1/4 in. wide metal body

Master Lock Vault Enterprise

  • Efficiently manage access to ensure the right users have the right access
  • Simplify security set-up with bulk user and lock uploads
  • Automatically map lock and lock box locations via smartphone
  • Easily monitor access with robust data and audit trails
  • Assured back-up entry method using manual, directional or numeric code
  • Leverage the security of 256-bit, military-grade encryption

Real Estate

  • No long-term contracts, monthly or shared access fees
  • Share access quickly and easily with showing agents, contractors, inspectors or even homeowners
  • Conveniently schedule temporary, permanent or future access
  • Monitor activity by device and user
  • Integrated with ShowingTime®, the leading real estate showing and scheduling management provider

Facilities Management

  • Secure areas, materials, equipment, keys or keycards
  • Easily assign access to groups or individuals by time and date
  • Efficiently manage many locks and many users
  • Increase accountability with audit trail of who accessed devices and when


Master Lock’s sturdy weather-resistant Bluetooth lock boxes just got an upgrade with the Master Lock Vault Enterprise system. Built with businesses in mind, Master Lock Vault Enterprise provides a flexible and user-friendly system for keyless lock and lock box management through the it’s web interface and smartphone app. Your smartphone becomes a smart key, eliminating the need for physical keys as well as the time and money spent rekeying, replacing and duplicating keys.

Administrators can create scheduled or permanent access for individuals and customizable groups. Always know where your locks are through automatic mapping and know when they’re being access through detailed audit trails. Enterprise enabled locks and lock boxes also integrate with ShowingTime® showing management tool, providing realtors and brokers with a one-stop solution for lock scheduling and access.

Exterior Dimensions

5 (H) x 3-1/4 (W) x 2-5/16 (D) in.

Inside Dimensions

3-39/64 (H) x 2-1/2 (W) x 1-7/64 (D) in.

Shackle Dimensions

A: 13/32in (10mm) B: 1-13/32in (36mm) C: 1-13/16in (46mm)

Access Type

Keypad – Digits, Smartphone/App



Code Length

up to 8 digits

Smartphone Compatibility

Android 5.0 or later, iOS 10 or later

Wireless Protocol

Bluetooth BLE

Battery Type


Battery Life

2 Years

Battery Back-up



Weather resistant to -40°


Master Lock


Master Lock


Black, Silver


3 lbs


1 Year Manufacturer

Share your thoughts!

4.5 out of 5 stars

2 reviews

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What others are saying

  1. Jane Furr (verified owner)

    Love the product however I wish I could choose my own time ranges.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  2. Great combo option

    T.C. Cooksley (verified owner)

    This lockbox is far better than the standard combo. It’s like using a 1-day code.

    (0) (0)

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Customer Questions & Answers

  1. Q Can you use more than one code, if so how many? answer now
    Asked by William Burt on May 24, 2020 12:40 PM
    Answered by the admin

    This lock can hold unlimited users. 

  2. Answered by the admin

    Yes, temporary access keys can be enrolled using the MasterLock Vault service. 

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