3 Usb rechargeable. Charging via the provided USB cable. 1200mAh polymer battery is included, No need to buy batteries any more. Lightweight Adjustable. Weighing only 68g and with its easily adjustable, elastic headband, the headlamp is perfect for outdoor running, cycling, fishing, camping etc. Its waterproof rate is IPX4, means the lamp is free from splashing Water. 3 White light modes (full brightness, half brightness, flashing). Super bright. Light your way up to 150m with this 150 lumens bright LED headlamp Adjustable Angle. Can be rotated at 45 degree up and down, this headlamp's beam angle is adjustable for oriented lightin