Description: A compact and powerful bike rear light keeps people and others safe and ensures that other road users can see you and your bike Four gears adjustment: the first gear strong light mode / the second gear slow flash / the third gear burst flash / the fourth gear fast flash USB charging, high brightness LED lamp beads, large battery, about 5 hours of battery life Made of high quality ABS plastic, one machine is multi purpose, compact and portable, sturdy and durable Rubber waterproof switch, easy to adjust with one key, easy to operate, suitable for various environments Specification: Material: ABS Size(LxW×H): Approx. 6.5x2x2.5cm/2.56x0.79x0.98inch Package Includes: 1 Piece LED Bike Light(2 Pack) 1 Piece USB charging cable(2 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!