The Master Lock No. 5440ENT Bluetooth® Portable Lock Box features a 3-1/4″ (83mm) wide metal body for durability and a fully removable shackle for convenience. Easily installs over door knobs or gates for short-term property access.


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.

  • 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 numeric code on lock keypad
  • Share access with others – temporary or permanent
  • Easily monitor access with robust data and audit trails
  • Removable shackle for easy portability and installation.
  • Low battery notification & reminder on device and in app
  • Comes with easy to replace CR123A battery
  • Large storage capacity for keys and access cards

Body Width: 3-1/4in (83mm)
Shackle Length: 1-13/32in (36mm)
Shackle Width: 1-13/16in (46mm)
Shackle Diameter: 13/32in (10mm)
Color: Silver & Black

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