Rechargeable Headlamps LED Adjustable Zoom Headlamp Headlight Torch 1800LM XM-L T6 Outdoor Gear Waterproofing design, not support diving. 3 switch Mode: Strong Brightness / Normal Brightness / Flashing Internal wiring applies the high efficient booster circuit; working voltage is wide and can utilize the batteries in the largest extent Adjustable base is provided for each head lamp, with back and forth inclination Power by: 2 x 18650 rechargeable li-on batteries (Not included)