Features:100% brand new and high qualityEasy and safe to use when braking5 kinds of sound effectsExtremely loud !#!amp!*! clear soundCompatible with all bikes including road bikesWork with 2 AAA Batteries (Battery NOT included)Specifications:Material: PlasticSize: About 94(L) * 46.3(W) * 38 (H) mmWeight: 96g Color: BlackPackage includes:1 x Battery excluded bicycle Handlebar Ring Bell Horn ??with package box??1 x Mini screwdriver