intelligent light design, wide range. The light guide strip with high light transmittance is adopted to make the more uniform and reduce light loss. Automatic brake sensor (can be turned off manually) sensor brake, it will for 3 seconds. Built-in ambient light sensor, tail light will automatically change brightness in auto mode. Double click to change mode, click to change brightness and flash mode. Product Name: Bicycle Light Model: SEEMEE 200 Colour: black Material: plastic Package Contents: 1 * SEEMEE200 1 * silicone strap 1 * cushion base 2 * cable tie 1 * USB charging cable Only the above package content, other products are not included. Note: Light 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.