SecurityIng&reg; Waterproof Super Bright 3600 Lumens LED Headlamp Support 90 Degree Adjustable Lighting Lamp 4 Modes Powerful Headlight for Camping, Traveling, Hiking with 4.2V Charger (18650 Battery Not Included) This kind of headlamp adopts the 3 x Cree XM-L2 LED lights which is more powerful than the T6 chip. In addition, the headlamp comes with an adjustable base which will enable you to change the light direction freely. Internal wiring applies the high efficient booster circuit, working voltage is wide and can utilize the batteries in the largest extent. With 4 modes for you choose and it is suitable for various of outdoor activities, such as cycling, camping, traveling, hiking, etc. Power Source: 2 x 18650 rechargeable li-ion batteries (Not Included).