SERFAS COSMO 30 LUMEN TAIL LIGHTBE SEEN FROM THE COSMOSIf you're one of those brave riders that go out riding at night, then you'll most definitely want a light on the rear of your bike so you are more visible to vehicles. The Serfas Cosmo 30 Lumen Tail Light provides 30 lumens to keep you safe and has an aluminum constructed body. The light is IPX6 waterproof so you can ride in adverse weather conditions with ease.FeaturesLarge and highly visible lens for maximum visibilityIPX6 waterproof means you can ride in the nastiest of weather conditionsCharges from dead to fully charged in 2 hoursLast Mode Memory so the light turns on in the last mode you used when you turned it off(Add more if you need to)Flash ModesModeHighLowDaytime FlashHigh FlashMedium FlashLow FlashLumens30153030157Run Time (h:min)2:004:005:158:0010:0013:00SpecificationsNumber of LEDs1Battery TypeRechargeableWeight60gWater ResistantYesLow Power IndicatorYesMounting TypeSeatpostBattery MountingInternal | Serfas Cosmo 30 Lumen Tail Light Black