It is a wonderful tool for the people who love riding bikes.

Features:
Build in 40 different patterns， 5 English words and 4 custom messages.
With the portable wireless message transmitter， you can change the color or pattern at any time.
Upload the messages directly from PC to USB， you can get different colors.
Automatic power off after 5 minutes.
The final lights will keep blinking for 1 minute after the wheel stopped.

Specifications:
Material: ABS
Light Color: Colorful
Light Number: 30 LED lights
Waterproof: IPX4K
Light Battery: 3 * AAA batteries(not included)
Transmitter Battery: 2 * AAA batteries(not included)
Working Hour: 72 hours
Item Size: 38.5 * 5.3 * 2.2cm/ 15.16 * 2.09 * 0.87in
Item Weight: 102g / 3.60oz
Package Size: 40.3 * 10 * 3cm / 15.87 * 3.94 * 1.18in
Package Weight: 236g / 8.31oz

Package List:
1 * Bike Wheel Light
1 * CD-ROM
1 * Bracket
1 * Transmitter
1 * User Manual(English)
1 * Box