RUIMX LED Camping Headlamp Build in 5000mAh 18650 Battery Waterproof for Outdoor Sports Hiking Camping Riding Fishing Hunting 2*18650 Batteries Build in. 5000mAh. Adjustable(90 degree) ,Hands-free,Comfortable, It is easy to adjust the head strap for your usage. Abrasion resistance,waterproof. Short ciruit, overcharge and discharge protection. Waterproof support you wearing it in the rain. 10-20 Hours Using Extensive lifetime of LED (100,000 hours), ABS portable material casing