One has to use two sliders in order to operate it. A slider for out body, the other away from the body. If you have mastered the fingering goes to the flame. Schick extent. Looks not quite as classy as in the pictures appear. Refilling not works. Did I specially bought a cartridge with various adapters. Adapter top, cartridge dock and off you go. Well then nothing works except the annoying finger play. Therefore, I only 1 star.