This item is a bike rear lamp, manufactured with for durable and use. The glowing design will ensure your safety when riding at night. The structure makes it looks unique and distinctive. A nice helper for you to use when riding your bike at night. Features -Color: As shown. -Material: Plastic. -Size: About 6.10X3.50X2.40cm/2.40X1.38X0.94inch. -Waterproof grade: ipx4. -Power supply mode: USB power supply. -Five lighting modes, highlight battery life <= 5 hours, flashing battery life <= 10 hours. -Made of plastic material, this bike taillight is strong and durable for long time to use. -The taillight is highly luminous and can allow you to ride safer at night. -It can be mounted on a child's bike or adult bike. It can also be attached to seat posts, handlebars, backpacks, helmets and so much more. -Practical accessory for night riding, ensuring their security, especially at the area without light. -The light is not only a bike rear light, but also a riding warning light, perfect for using at night. Package list: 1 x bike tail light 1 x fixing strap 1 x USB cable