The Proteam Wind-Up Headlamp requires no external batteries, it uses just one internal battery that you charge with a crank handle, saving money and preserving the environment. Utilising the power of 3 LEDs the head torch produces are far superior light compared to standard bulbs also with being a head torch you can direct the light to exactly where you are looking with both hands remaining free. Key Features Energy Saving this product requires no outside electrical input, all you do is turn the handle to power up the light. 1 Minute = 20 Minutes simply winding the handle for 1 minute at a consistent rate with provide you with 20 minutes of lighting. Elasticated head strap allows the light to fit all manner of head sizes firmly (fully adjustable) Adjustable light position for maximum effectiveness. Variable use either 1 LED, 3 LEDs or all 3 LEDS (flashing).