Cree XPL 1200lm SP40 LED Headlamp 18650 USB Rechargeable Flashlight With Power Indicator & Magnet Tail Product Description: - Sofirn SP40 Flashlight: CREE XPL LED with a lifespan of 50,000 hours - Battery Options: 1 x 18650 Li-ion battery (not included) - Dimensions: 108mm (length)*25mm (head diameter) - Weight: 63±1 gram (without batteries) - Body: Aerospace grade 6061 grade aluminum alloy, CNC manufactured to Military Grade Specification type ? hard-anodized anti-abrasive finish - Lens: Toughened mineral glass - Waterproof Level: IPX7 - Reverse Polarity Protection: Prevents improper battery installation - Mode Memory: Remembers last brightness level used in general modes (except Strobe) - Advanced Temperature Regulation (ATR): Automatically adjusts brightness level when driver temperature reaches 55? to prevent overheating - Power Indicator: LED indicator on side switch blinks green for 5 seconds if remaining battery power is over 30%, red if below 30%, flashing red indicates low power - USB Input: 5V1A - Operation Instruction: Short click to turn on/off, side switch to cycle through modes (Low?Mid?High), double clicks to activate Turbo mode - What You Will Receive: 1 x Headlamp, 1 x Replace O-rings (battery not included)