DITOP&reg; Improved version Outdoor Waterproof 1600LM XM-L T6 LED Headlamp with AC Charger With 2pcs 3.7V Rechargeable 18650 5000 Mah Batteries for Camping Fishing Hiking Traveling or Household Rechargeable Batteries + Charger (K11 Headlight) Perfect fit for outdoor sports, such as camping, traveling, hiking and etc. Material: Aluminum alloy casing, avoid high temperature, fall-off protection. Working voltage is wide and can utilize the batteries to the largest extent. Luminous Flux: Output brightness comes to 1600 lumens (Max). Internal wiring adopts the high efficient booster circuit.