Power detection display (in the shutdown state: short press the button, the middle vertical light bar will display the battery power. 7 LED beads, 1 light is 10%, 2 lights 25%, 3 lights 40%, 4 lights 55% , 5 70%, 6 85%)After the bicycle falls to the ground, the tail light will flash horizontally and vertically.Light sensor, when the light is strong, such as daytime or strong light, the light automatically goes outBuilt-in 3-axis sensor, this is a real smart taillight, which is different from the smart brake taillights advertised by peers on the marketThe battery capacity is 1400mah, the waterproof grade is IP66, and the standby time is 1.5 yearsColour:blackMaterial: PC+ABSSize:97mm x 75mm x 51mmPackage Contents:1 x Bicycle taillightsOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.