Mitaki-Japan® head lamps provide hands-free illumination ideal for investigating dark spaces or conducting handiwork projects. 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. Measures 2-5/8" x 2-7/8" x 1-3/4". Clamshell.