Wireless remote control steering taillights for bicycles, lighting modes can be switched at will, and crisscross taillights can your safety when at night. IPX4 is waterproof, not afraid of , not affected by weather conditions, and can be used in most weather conditions (it can't be soaked in rain for a long time) A of installation methods can meet your different needs, such as on the tube , under the cushion or on some helmets. Wireless remote control, simpler operation, wireless control of taillights to turn left and right, reminding vehicles to safe . ABS shell, durable and fall-resistant, easy to install without tools. Name: Mountain Bike Wireless Remote Control Taillight Weight: about 167 grams Type: light Type: bicycle accessories/ equipment color:Black Material:ABS size:20.5 x 10.4 x 3.8cm Package Contents: 1 x taillights 1 x remote control 1 x helmet mounting strap 1 x mounting strap of tube 1 x mounting strap 1 x USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.