Skycoolwin 8000 Lumen 7x CREE XM-L T6 LED Bicycle Bike Light 3 Mode + 8.4V 6800mAh Battery Pack + US Plug Adpter + Taillight Can be used as Headlamp or Bicycle Light Internal wiring applies the high efficient booster circuit, working voltage is wide and can utilize the batteries in the largest extent Waterproofing design Aluminum alloy casing Output bright can come to max 8000 lumens /lm