Using highly sensitive intelligent sensor chip, it can accurately detect vibration and braking action. COB lamp beads and PC lens, the light is bright and not dazzling. During riding, the Q5 will display at maximum brightness when it senses the brakes. The light will automatically turn off when there is no vibration after 30 seconds of parking, and will automatically turn on when vibration is felt, except in the constant-on mode. Built-in 400mAh polymer lithium battery, USB fast charging. CNC all-aluminum alloy shell, scratch and drop resistant.Two installation methods are available.