Product Description Material: ABS+PC Size: 6.6 * 4.9 cm Battery Capacity: 280 mA Waterproof Rating: IP65 Color: Blue Quantity: 1 Piece Package Contents: 1pcs Supercharged Bicycle Bell Compatibility: Two-speed adjustment, suitable for all kinds of handlebars from 22-31.8mm 1. Safer Very loud bicycle bell up to 120 decibels, more secure, especially in When cycling in the dark, a loud enough bell can warn other road users (while not disturbing them) to keep a safe distance from the driver. 2. Ultra-long working time USB charging bicycle ring, fully charged in 1.5 hours, can be used continuously for 2000 times, running for about 20 to 30 days, standby for 180 days. 3. Multiple switching modes This bicycle bell has 4 sound modes for different environments: horn, whistle, alarm, vibrating bell. Separate multifunction buttons for toggle and mode switching. Ring strength can be adjusted for different uses. 4. Multiple protection, longer service life, dustproof, anti-drop, IP65 waterproof, suitable for outdoor activities. 5. Suitable for all normal bikes Easy to assemble, no tools required, with Velcro fasteners, you can use it for all kinds of bikes, such as MTB/racing/BMX, handlebars from 22-31.8mm.