The HR20 is a versatile USB rechargeable headlamp with extensive runtime, extremely light weight and impressive output for outdoor use. A CREE XP-L HI LED delivers 1000lumens impressive flood light. Powered by 1 pcs of 18650 Li-ion rechargeable battery or 2 pcs CR123 Lithium batteries which will provide the runtime of 360 hours to the headlight. Rotary infinite brightness adjustable, which practicality enhances outdoor applications. Utilizes patented reflector vacuum coating cup with floodlight and spotlight, can be called as “outdoor lighting artifact”.