The Master Lock No. 5440EC Bluetooth® Portable Lock Box features a 3-1/4" (83mm) wide metal body for durability & a fully removable shackle for convenience. Secure your home or business with the Master Lock Vault System for unmatched security, simplicity and accountability using the latest technology from Master Lock.

Use your smartphone to open and manage your lock with the Master Lock® Vault System compatible with both Master Lock Vault Home and Master Lock Vault Enterprise

The free Master Lock Vault Home iOS and Android apps are designed for personal use, supporting up to 10 locks, and allows you to monitor access history

The free Master Lock Vault Enterprise iOS and Android app and web interface are designed for business applications working with many locks and many users allowing you to easily monitor access with robust data and audit trails

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

Removable shackle for easy portability and installation

Low battery notification & reminder on lock box and in app

Comes with easy to replace CR123A battery

Large storage capacity for keys and access cards