An alarm lock that can be opened with your smartphone. With app control, iOS and Android system support, automatic and manual mode, and anti-theft features, this product can be used for bicycles, back of home, warehouse, storage room, storage room, post, locker, etc. Specifications: Material: ABS plastic & copper; Color options: Red; Black; Blue; Cable length: 31.5 inches (80 cm); Cable diameter: 0.4 inches (1 cm); Weight: Approx. 10.6 oz (311 g); Power supply: 3 x AAA batteries (not included); Package: 1 x lock only