The Master Lock No. 4401D Bluetooth Padlock features a 2-7/32 in. (56mm) wide metal body for durability. The 11/32 in. (9mm) diameter shackle offers 2 in. (51mm) 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.
- No keys to lose, no combinations to remember: your smartphone unlocks the lock, or enter directional code on lock keypad for easy backup entry when your smartphone isn’t present
- Full body all-weather cover for superior weather protection, metal body construction, boron Carbide shackle, and anti-shim locking mechanism for improved security
- High-quality metal body construction: boron Carbide shackle and anti-shim locking mechanism for enhanced security
- Temporary or permanent access via Bluetooth or keypad code with invited guests, monitor activity, and receive tamper and low battery alerts
- Military-grade Bluetooth authentication and encryption
- No keys to lose, no combinations to remember: your smartphone unlocks the lock, or enter directional code on lock keypad for easy backup entry when your smartphone isn’t present
- Full body all-weather cover for superior weather protection, metal body construction, boron Carbide shackle, and anti-shim locking mechanism for improved security
- High-quality metal body construction: boron Carbide shackle and anti-shim locking mechanism for enhanced security
- Temporary or permanent access via Bluetooth or keypad code with invited guests, monitor activity, and receive tamper and low battery alerts
- Military-grade Bluetooth authentication and encryption
