4400D Bluetooth Padlock, Indoor, Black/Silver, 1.9" Width-(MLK4400D)

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 and receive tamper alerts Backup access using directional code on lock keypad Low battery notification and 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