Description USB rechargeable bicycle tail lamp, built-in lithium battery, USB charging, will automatically shut down when fully charged. The lamp is small in size, light in weight and easy to carry, portable for riding, cycling and more. LED bicycle tail lamp with anti-skid silicone snap, easy to install, no damage to the body. High quality LED lamp beads are used for bike warning lamp, which has high brightness, low power consumption, energy saving and environmental protection. Bicycle lamp has super waterproof property, so you can ride freely no matter whether it is sunny or rainy. There are a variety of lighting modes and colors to choose from, which can be used as warning lights. Specification: Material: Plastic + Silicone. Light Source: COB + LED. Color: White Light, Red Light, Red White Light, Red Blue Light. Lighting Mode: Normal/Slow/Sequential/Fast. Battery: Built in 500mAH Rechargeable Battery. Power supply: USB charging. Charging Time: 2 hours, working time about 5 hours.(different lighting modes have different power consumption) Waterproof: Yes. Brightness: 100lm. Application: Bicycle, Scooter, Electric Car. Size: 80x15x20mm. Notes: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: 1 x Lamp. 1 x USB Cable. 1 x Silicone Snap.