Useful for bicycle riding.

Features:
Aluminum material， strong and compact to carry.
Easy installation and quick lock.
3 modes of light: full light， slow flash and quick flash.
Strong light to ensure your safety when riding at night.
The light will be off in a few seconds when you stop riding.
Come with USB， you can charge it by using your charge pal or your computer. 

Specifications:
Material: Aluminum Alloy
Color: Purple / Red / Black(optional)
Light Color: Purple(Red and Blue Light) / Red(Red Light) / Black(White Light)
Lumen: 50 Lumens 
Mode: Flash， Slow Flash， Long Light
Battery: 1 * Lithium Battery
Item Weight: 37g / 1.32oz
Package Size: 14 * 9 * 4cm / 5.51 * 3.54 * 1.57in
Package Weight: 82g / 2.92oz

Package List:
1 * Bicycle Rear Light
1 * USB