1. Skid-proof Design2. Reflector: Convex Lens3. Internal wiring applies the high efficient booster circuit， working voltage is wide and can utilize the batteries in the largest extent.4. Waterproofing design， "O" ring sealed.5. Battery type: 1 x 18650 3.7v Battery or 3 AAA batteries (Not Include)6. Super Bright， blinding Effect7. Adjustable focus range for different usage8. Switch :Tail-cap press ON/OFF9. Clip for convenience carry10. Suitable for Self Safety， hunting， cycling， climbing， camping and outdoor activity etc.11. External Dimension: 35mm(Head)x25mm (Body)x 135mm(Length)Package Included:1 x Flashlight