1.16 four-color SMD red, blue, yellow and green LED lights on one side and 32 on both sides.2. Product size: 165 * 65 * 30MM3. The product is equipped with dynamic and light-sensitive double switches, the light can be automatically turned on during night driving, and automatically turned off after 30 seconds of parking. Humanity flower design for energy and labor saving.4. The product only needs 3 AAA batteries and can work continuously for 15-20 hours.5. No switch and all PC / PU plastic parts ensure product brightness and waterproof.6. Product Features and Benefits: Only two movable PU bolts can be easily installed on the bike spokes (there is also a detachable bracket bolt version available). The two lower bolts and the upper mounting bolts are installed in opposite directions. Centrifugal force makes the two opposing forces stronger when the car is spinning, which makes the product more stable on the spokes. That is, two bolts can provide a firm and stable installation.7. A total of 30 different patterns flashed.