Compact and rechargeable, this headlamp delivers 190 lumens - an amount ideal for many dynamic and intense activities. But what makes this model unique is Petzl's introduction of reactive lighting technology. Producing a mixed beam, the device uses a sensor that analyzes the area's ambient light, and upon detecting it, it immediately adjusts the brightness. In response, you get more use out of the battery and have to make fewer manual changes.. . Main lighting source generates a mixed beam, which works with a light sensor to control reactive lighting. Can be charged with integrated USB port. Includes a washable and dynamic headband with two-part construction, which allows for the right degree of positioning. Includes an optional battery case for use on the go. Imported.