Battery Powered Waterproof 5 LED Bicycle Tail Light Night Riding Rear Warning Lamp 
Battery Powered Waterproof 5 LED Bicycle Tail Light Bike Rear Warning Safety Lamp 
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Features: 
1. Waterproof and shockproof bicycle taillight with a unique highlight lighting design;
2. With 5 highlighted A-level LED lamps and 7 kinds of light modes;
3. Particularly suitable for high-grade bikes and night riding;

Specifications:
Size: about 10.8 x 4.0 x 2cm/4.25 x 1.57 x 0.79" (length x width x thickness)
Power supply: 2 x AAA batteries, push the battery cover, you can directly install the battery (battery is not included in the package)
Applicable seat tube diameter: about 3.2cm/1.26" straight tube

7 light modes: 
5 LED normally on
5 LED quick flashing
5 LED slow flashing, 5 LED spreading from side to middle
5 LED spreading from middle to side
5 LED super strobe
5 LED side and middle flashing in turn