colour:Black+white+red Material:Plastic, silicone size:45 x 50mm Package Contents: 4 x light (white light) 4 x Tail light (red light) 4 x Silicone belt 4 x USB charging 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. What it is: Bike lights, bike accessories, Safe night travel: ride at night, while enjoying the tranquility of the night, you also need a good taillight. Advantage: High brightness, . Bright but not dazzling. Waterproof, bid farewell to rainy troubles, ride as you like. Long-term battery life, to support your continuous riding without fear of bumps. The parts are not easy to loosen, and the internal structure is stable. How to installation: 1. Install the silicone strap downward and forcefully on the taillight 2. Fix the silicone strap on the taillight 3. Adjust the tightness to a suitable position 4. Installation is complete. Why choose us: We will strictly carry out the quality-control project, which will enable our customers to buy with confidence and use with satisfaction.