Features:
- Blue Bike   Wheel Light - Bike Wheel Light with 20 led beads & blue flash lights   provides cool lighting effects for night riding;  attracting attention &   making you stand out from others; Fits most bicycles with wheel circumference   less than 78 3/4";  suitable for BMX bikes;  commuter bikes;  mountain   bikes;  road bikes;  etc    
- Automatic Lighting - With built-in sensor; it automatically switches on at night when the bike stays moving and switches off when the environment brightens or you're stationary for 1 minute; saving energy and convenience
- Safe to Ride - No riding speed required; it provides bright & eye-catching lighting to handle low-light conditions; making you visible to other road users and pedestrians to ensure a safe ride
- Flexible & Easy Installation - The light strip allows you to flexibly wrap to create a special lighting effect or cut to better fit your bike; Quick and easy to install by wrapping the light strip on the bike spoke and securing with included screws
- Battery Powered - Powered by 2 AA batteries (Not Included); it allows you to use cool spoke light everywhere you go
Specification:
- Overall   Dimension(LxWxH): 2 3/4" x 1 3/8" x 13/16" (7 x 3.5 x 2 cm)    
- LED Light String Length: 78 3/4" (200 cm)
- Power: 0.06 W
- Water Resistance: IP 44
- Light Color: Blue
- Net Weight: 0.13 Lb (0.06 kg)
Package Content:
- 1x LED  Light String (for 1 Wheel)    
- 1x Battery Compartment
- 1 Set of Screws
Notice:
1.AA   battery is not included.    
2.Before purchasing; please measure the circumference of your bike wheel and the circumference should no more than 78 3/4".
3.Please note that even though this light strip can be cut short; the rear lights which come after the cut section will no longer light up; but the front lights which come before the cut section will still be operational. It is impossible to reconnect after cutting; therefore please measure the required size carefully before cutting.
Notes: Attention: Ebay MAP:$11.9; Other platform MAP: $11.9.