Package Include:1 x Bell1 x Silicone Cable Tie1 x Charging Line1 x InstructionSpecifications:Features:- 120dB high decibel, small volume, high volume.- Small size, can hide in the car inside, do not affect the brake.- There is a built-in booster circuit.- Built-in 280mAh lithium battery, equipped with android USB charging, 1.2 hours can be filled.- The charge can ring the bell 2000 times at a time, about 20 to 30 days normal use.- When charging, the light is red and the light is green.- Please close the waterproof cover after charging, so as to avoid rain washing.- The controller is installed next to the thumb, easy to click and switch the sound, so that you ride more safety.- Compact size, easy to install.Model Name: T-002Material: ABS+PCColor: Red / BlackSound Level: 110-120dBInput Voltage: 5VInput Current: 250mABattery Capacity: 280mAhWaterproof: IP65Application: 22-31.8mm Various HandlesProduct Size: 66 x 49 mm