Tagvo USB Rechargeable Headlamp Flashlight Manual & Motion Sensor ON/OFF Switch, Water-resistance Dimmable Cree LED Headlight 160 Lumen Super Bright Built-in 1200 mah Rechargeable Battery 4~60H 2.5OZ RECHARGEABLE: built-in 1200mah USB rechargeable battery, cost 4~5 hours to full charge. DOUBLE SWITCH: designed with MANUAL SWITCH for high/low/flashing three model and MOTION SENSOR SWITCH for convenient on/off. DIMMABLE: brightest model last 4 hours with 160lumen/80m distance, or dimmest model last 10 hours with 30lumen/20m distance, or flashing model last for 40hours. WATER-RESISTANCE: IPX4 level waterproof, can be used for heavy splashing and rain. CONFORTABLE: mini compact size--62*37*44mm, lightweight--70g, wide angle lighting view design, soft and strong elastic headband.