XILALU 5000LM CREE XM-L T6 LED Headlamp Headlight Flashlight Head Light Lamp 18650 waterproof adjustable beam, durable, lightweight Internal wiring applies the high efficient booster circuit, working voltage is wide and can utilize the batteries in the largest extent. Dimension : 45 x 90 x 38mm. Waterproofing design. Model of Battery required: 2x 18650 Battery (Battery & Charger Not Included ). Model of LED: CREE XM-L T6. Adjustable base is provided for each head lamp, with back and forth inclination.