Cygolite Metro 550 USB Rechargeable Headlight with Cygolite Hotshot 2-Watt USB Rechargeable Tail Light and 24 Oz. Water Bottle Powerful 550 lumen, 5 watt output Cree XM-L LED USB rechargeable Li-ion battery Exclusive DayLightning mode boosts over 600 lumens of lightning-like flashes for increased daytime safety Water resistant design for all riding conditions