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The Master Lock No. 4400EC Bluetooth® Padlock features a 1-29/32in (47mm) wide metal body for durability. The 9/32in (7mm) diameter shackle offers 7/8in (22mm) 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.

  • 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
  • Comes with easy to replace CR2450 battery
  • Battery jump allows for temporary access if battery dies while locked