Master Lock® 4400D Bluetooth Padlock, Indoor, Black/Silver, 1.9" Width Item: MLK4400D

• CR2450 Cell Battery
• 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.

Features a 1 29/32 in (47mm) wide metal body for durability. The 9/32 in (7mm) diameter shackle offers 7/8 in (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, keyless convenience and the ability to share access. The locking mechanism features anti-shim technology, offering maximum security.