Features of Led Safety Belts for Cyclists Multifunctional Warning Light Feature : Riding Warning Light / Safety Light Strip Light Belt Working at Night Remote control Waterproof 12 Leds Light Color: Yellow Light Size: About 72-98 Cm Long (Adjustable) Material : ABS Charging Time: Average 2.5 Hours It also works with 1200 ma battery. Charge Input: Usb Battery Capacity: 450 Mah Voltage : 3.3 Volts ~ 4.2 Volts Model : 18600