XCSOURCE RJ-3001 5000LM 3x CREE XM-L T6 LED Focus Headlamp Headlight Zoom Head Torch Lamp Bicycle Bike Front Lamp Camping Hiking Cycling Light + 2 X 18650 Rechargeable Battery + 1x USB Cable LD374 90 degree Adjustable and Zoomable Headlight Waterproof, but don't put it into water directly Extensive lifetime of Cree LED (100,000 hours) Revolutionary focus technology Internal wiring applies the high efficient booster circuit; working voltage is wide and can utilize the batteries in the largest extent