LED Bike Taillight, USB Rechargeable, 3 Colors 6 Modes, IPX6 Waterproof, Bicycle Rear Light Accessories Fit on Any Bikes, Helmets and Backpacks for Cycling Safety (Bike Wheel Light);

One Button Control:
1.Power on/off : long press
2. Switch color: double click
3. Switch mode: single click

Specifications:
Compatible hub diameter: 19 - 36mm
Color: red, blue, green, colorful
Mode: steady, slow flashing, quick flashing
Power type: rechargeable Li-Battery
Work time: 12 hours

Package:
1x Bicycle Hub Light
3x Adhesive Pads
1x USB Charging Cable

Warranty: 12 months worry-free warranty. Friendly customer service for any problems with the product.