(1)PRODUCT FEATURES: Use this unique rainbow flashing LED spoke light to customize your wheels and have the hottest bike in your hood. This glow-in-the-dark flashing spoke light provides perfect safety for night biking, and lets traffic see you coming from afar. Your friends will be in awe once they see you riding around on rainbow wheels. Bicycling glowing LED safety wheel light Makes your bike be seen and be safe! 3 kinds of flash:flash fast,flash slowly,steady. Fast on & off, install in seconds Water resistant, durable to use Available colors: Refer to pictures. (2)PRODUCT DESCRIPTIONS: Powered by 1 x CR 232 3V button cell Net Weight: 35g/ 0.81oz Size: 120 x 35 x 23mm/ 4.72 x 1.38 x 0.91inch (3)WHAT"S IN THE BOX? 1 x Bicycling LED Light (4)Important Note: Please double check your measurement before purchase. This is 1 LED light.