This state-of-the-art flashlight can generate power by just the twist of your wrist, making this a battery-free tool. It can outlast any flashlight twice over, delivering 45 to 60+ minutes of power from just a one-minute wind up. Features include: Battery-free operation Generates power just by twisting your wrist Outlasts any flashlight with 45 to 60+ minutes of power from a 1-minute wind-up Gives you the option of 3 or 5 LEDs