Three-color dimming USB rechargeable bicycle taillight $ 8.65 Product Name: Bicycle Tail Light Size: Length 7.5CM, Diameter 2CM Product features: three-light source taillight, charging design is more energy-saving and environmentally friendly. Material: aviation aluminum alloy, ABS, rubber, silicone Function: This product has three light sources, the charging design is more energy-saving and environmentally friendly Waterproof function: anti-life rain