1.  LIGHTWEIGHT AND FLEXIBLE - The headlamp is lightweight, so you feel the head is not stressed, you will feel very relaxed, and the headlamp is equipped with high-quality elastic bands, you will feel very comfortable, no need to hold your hands.2.  LARGE CAPACITY BATTERY - Built-in rechargeable batteries, lithium 4000 mAh battery capacity, full intensity can light illumination 6 hours continuously, weak light 15 hours.3.  HIGH POWER LED - 3W led provides you with brighter light to give you clear visibility on nights. Perfect for under construction sites, gold mining sites, yacht, running, walking, fishing, hunting, hiking, cycling, reading, caving, walking the dog, DIY projects, auto repair & emergency kits.4.  WATERPROOF - It is protected against splashing water from all angles, and is suitable for outdoor environments, and adverse weather conditions. You can also use these headlamps in the rain.5. 2 ADJUSTABLE LIGHT MODE - High- Low Lighting Mode, you could simply press the power button to switch. The head of this lamp is adjustable up and down and will stay steady after positioning.Dimensions: 8.2 x 10 x 8.2 cm\''