This is not the most powerful LED lamp in its class but very suitable for everyday use. Fits hassle in the box to the car glove. Zooming is a little gadget: focusing max is obtained an almost square beam, as the emitting LED. In addition, it is close to the ring unscrewed the lamp, while careful not to confuse. Two power options: battery 3.7 V 18650 (unusual in France but the US yes) or 3 AAA batteries (supplied adapter). The power of 7W, I think not too much (it would mean almost out of batteries or rechargeable batteries 2A ... The card manufacturer reported 4W max.). Lumens is even more mysterious. Cree says 230 lumens 4W. We change the lighting mode (high, medium, strobe) by lightly pressing the on / off button is located at the end of the lamp. Belt Clip + comes with adjustable strap. Very neat package (two types of bubble plastic) and fast delivery.