- Use your smartphone to open your lock with the free Master Lock Vault eLocks app
- Never worry about a forgotten combination!
- Share access with others - temporary or permanent
- Share 24/7 access or limit to days or nights
- Monitor access history & receive tamper alerts
- Backup access using directional code on lock keypad
- 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
- Locker Mode setting allows for storage inside a locker
- Compact footprint fits most lockers
- Hardened boron alloy shackle for superior cut resistance
The Master Lock No. 4400D Bluetooth SmartÂ® 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 smartphone/app interface offers speed, ease of use, & greater control with the ability to share access; with keyless convenience. The locking mechanism features anti-shim technology, offering maximum security. The 1 Year Limited Warranty provides peace of mind from a brand you can trust.