The Ozone II head torch is a 3 LED light that is soft on the environment and soft on your wallet - it never needs batteries. Just one minute of cranking gives you 90 minutes of light. The Ozone II can be used as a small hand held torch, but if you need both hands free, you can just clip it onto the included head strap. It has three operating modes, 1LED>3LED's or flashing. The size is 814x49x38mm, weight including the head strap 96.30gr.