1. Ample rear lights: the package includes totally 4 pieces bike rear tail light, each light contains a rubber strap and a USB cable 4 Pieces lights give out red color, if you want to turn off the light, please long press the button 2. Bright light for your : the COB lamp beads of rechargeable bicycle taillight bright light to provide good visibility for cyclist in the or foggy morning, effectively remind others of your appearance to protect your 3. USB rechargeable: connected to USB cable, ultra bright bike can be charged by computer, power bank or other electronic equipment with USB interface, 3 hours are enough to fully charge the light, then the bike tail light is durable for a long time use 4. feature: bicycle LED light has a waterproof feature, which allows people to use the light in rainy days or snowy days The light provides the same illumination in both unsatisfactory weather and common condition