The 120-decibel electric bicycle horn has a clear and loud sound effect, enough to warn motorists and pedestrians. Press and hold the button for 2.5 seconds to change the speaker mode. With 4 ringtone modes, USB charging for 20 minutes, with alarm mode, which can remind you if your bike is moved or stolen. This bicycle horn is made of high-quality ABS plastic, strong and durable. Not easy to damage, reliable quality and long service life. The bicycle handlebar alarm electric horn is lightweight and compact, the available size (length x width) is approximately 34mm * 60mm. The electric bicycle handlebar with a rubber ring is easy to install, suitable for handlebars of different diameters and easy to use. Specification: Material: ABS plastic Sound: four ringtones Volume: 120 decibels Battery: 200 mAh Weight: 25 grams Size: 34mm * 60mm Package includes: 1 * bicycle bell 1 * USB cable