Features:
Programmable design: You can easily design 4 patterns as you like.
30 blue LEDs with double-wing design.
Light with 40 patterns， 5 English words and 4 programmed messages shining by turns and changing every 4 seconds.
Adopt IR technology， able to program and send messages via a portable transmitter with USB port.
Able to easily show clear patterns at speed of 7km/h and above.
Equipped with magnet sensor， flash continuously in the action.
Automatic and manual power on and automatic power off.
Powered by AAA batteries (not included).
Easy installation.

Note: The bike wheel spoke light can be used in rain but can not be soaked in the water for long time.

Specifications:
Quantity of LED: 30
Color of light: Blue
Material: ABS
Limit of wheel diameter: 20in and above 
Requirement of speed: 7km/h and above
Wheel light size: 38.5 * 8.8 * 2.3cm / 15.2 * 3.4 * 0.9in
Wheel light weight: 103g / 3.6oz
Package size: 40.5 * 10 * 3cm / 15.9 * 3.9 * 1.2in
Package weight: 240g / 8.4oz

Package Listing:
1 * 30 LED Wheel Light
1 * Wireless Portable Message Transmitter
1 * Bracket with Magnet Sensor
1 * Software DC
1 * User Manual (English)