Features USB rechargeable bike rear lamp, built-in lithium battery, USB charging, will turn off automatically when fully charged. LED bike rear lamp with anti-slip silicone pressure, easy to install, no body damage. High quality LED lamp beads are used for bicycle warning lamp, which has high brightness, low energy consumption, energy saving and environmental protection. The bicycle lamp has super waterproof property, so you can ride freely no matter if 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: red white light Lighting Mode: Normal/Slow/Sequential/Fast. Battery: Built in 500mAH rechargeable battery. Power: 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 may be color distortions due to different computer resolutions. There may be small errors due to different manual measurement. The package includes: 1 x lamp. 1 x USB cable. 1 x Silicone Snap.