... tech integrated circuits and digital se bike alarm lock,alarm lock,bicycle alarm lock Insert key and turn to open ... warning tone. Feature(1).Used on: Fit for bicycle, motorcyle, electrombile,door and so on.(2).Design ... lowest among the similar lock.1.Alarm functionThe alarm lock uses low-voltage electric buzzer, when burglar prying, smashing ... situation. bike alarming lock,alarming lock,bicycle alarm lock