WATERPROOF IPX5 BICYCLE HORN BELL 125DB WITH ANTI-THEFT MODE THAT DETECTS VIBRATION WHEN THE SYSTEM IS ON BUILT-IN 200MAH BATTERY WITH CHARGING ON USB - RUNNING TIME ABOUT 40 DAYS - CHARGING TIME IS 20 MINUTES High volume The 125 decibel electric bicycle horn has a clear and loud sound effect that is enough to warn drivers and pedestrians Alarm anti-theft Press and hold the button for 6 seconds to start the anti-theft system, when vibration is detected, the speaker will make a sound for 15 seconds, charging USB for 20min Waterproof and durable This bicycle horn is made of high quality plastic ABS strong and durable , not easy to damage reliable quality and long service life Suitable for all handlebars easy to install The bicycle horn with rubber ring is easy to install suitable for handlebars of different diameters and easy to use. Lightweight and compact available size (length x width) is about 38mm x 60mm USB battery: The bicycle horn has a built-in 200mAh battery charged on USB. Charging time is 20min. this electric bicycle horn can be used for about 40 days, rubber fixing ring can be used 3000-4000 times Material: ABS Product Color: Black Product Size: About 60x38x34mm Net weight: about 36g Sound Level: 125 decibels Number of sounds: 1 Battery capacity: 200mAh lithium polymer battery Battery life: 40 days Charging method: USB Charging time: about 20 minutes CONTENTS OF THE SET 1 x BICYCLE HORN 1 x CHARGING CABLE 1 x FIXING RUBBER 1 x SELF-ADHESIVE RUBBER PAD