GREEN ITEM no batteries needed, Features adjustable headband that allows it to fit on a hat or directly on your head and 3 LED lights with 3 settings: 1 bulb 3 bulbs or 3 flashing bulbs, 1 minute of winding gives you approximately 90 minutes of light with 1 LED bulb or 40 minutes with all 3 bulbs, Clam packed, SKU: BFELHEADLT