1. A hair-removing system comprising: a hair-detection device and a hair-removing device that is operatively coupled to the hair detection device, wherein the hair-detection device comprises: an imaging device comprising a first image sensor, that is constructed and arranged to detect an image of a part of a skin to be treated, and a control unit that is constructed and arranged to discern in the image a hair on the part of the skin, and that is operatively coupled to the hair-removing device to control operation thereof, characterized in that the imaging device comprises a second image sensor that is different from the first image sensor.