Deck out your bike to shine through the night with these Green Cosmic Brightz. Cosmic Brightz have over 36 hours of glow time, and are super simple to twist-on to install. Be cool and be seen with Brightz for your bikes! With Brightz you can be slick and safe all at once. Waterproof. Package includes a 6.5 foot long string of 40 luminous microLED lights, a mounting strap for securing the battery pack, and a mounting tie to secure the LED lighting. Requires 3AA batteries, not included. Does not replace real safety equipment, be safe out there and wear your reflectors and helmet.