Product color: black, blue, red Product material: aluminum alloy + engineering plastic Product size: 43.5*52*30mm Product weight: 43g (single bell) Battery capacity: polymer 280mAh Charging method: USB charging Volume decibel: 120 decibels Single package size: 7.6*7.3*4.3CM Single with packaging weight: 80.3g Packing quantity: 100 Suitable models: road bikes/mountain bikes/balance bikes Installation method: Velcro strap (length 17CM) Sound adjustment: 5 types (door bell, metal bell, vibrating bell, whistle, whistle) |