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 Smart® 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.