Check the listing for details. Trustfire LED Headlamp Rechargeable Headlight Head Torch Lamp Flashlight 1200lm. Color: Black, Condition: New. Listed at 34.99 USD. About 18650 battery use: Please be sure to use the 18650 battery with PCB protection plate board!!! MC18 is a perfect magnetic USB charge EDC flashlight and headlamp for dual-use, intelligent circuit build inside,constant current,constant brightness. with a faster 5V 2A magnetic charging cable and it could charge directly with power bank, computer etc. you can charge it conveniently. Free your hands and increase exploration of the outdoor experienceProduct Specification:-Powered by 1*18650 or 2*CR123A, 400 hours runtime in moonlight mode.-5 working modes: High>Middle>Low>Moonlight>Strobe.-Could be used as headlamp, flashlight, EDC light, camping light. Lumens up to 1200LM-Patent mode conversion design.with pocket clip-Specification: 84mm (length) x 29.5mm (diameter)-Net weight: 40.2gTrustfire MC18 Operation:One-click operation-ON/OFF: hold down for 0.8 second-Switch working mode:click to change modes(switching cycle)-Memory mode:automatically memorize the current mode-Strobe mode: hold down for 2 seconds-Lock/unlock: double-click in quick-Magnetic charging: automatic adsorptionNote: The ON/OFF mode and the Strobe mode should be used in unlock modeTriple circuit protection:-Anti-reverse connection design to prevent the battery from being installed backwards and causing harm to the circuit-Low voltage warning:If the power is about to run out when the low brightness gear is detected, the red indicator light will start flashing, indicating that the power is insufficient; the light of the flashlight will flash slowly three times a minute to remind, charge the battery to avoid damage to the battery-Intelligent constant temperature:When the built-in chip detects a high temperature, it will gradually reduce the working power to avoid rapid overheating of the flashlight, after the temperature is reduced, it will automatically and gradually restore the current gear of full power work.Package included:1*18650 3400mAh battery, 1*Magnetic rechargeable cable, 1*MC18 headlamp, 1*Headlight belt, 1*Headlight mount, 1*package box.