Overview: Quiver-Style alarm 110 d B high export sound Protect the bike lock from destroyed & prevent the behavior of moving the bicycles by the thief Have the functions that the anti-theft lock can not substitute Code switch, convenience to use, avoid key switch weakness which easy to open with other key Powered by 1 6F22 battery (not included) Comes with English/ Chinese user manual Specification: Dimensions: 3.86 in x 2.36 in x 1.46 in (9.8 cm x 6.0 cm x 3.7 cm) Weight: 1.94 oz (55