the vibrating agents on the side help eliminate discomtort,take extra care to extend the leg before removing hair from behind the knee,may be used for the bikini area (holdt the skin taut with one hand),can be used to remove individual hair the upper lip and chin area,may be used to remove hair from underarms(extend your arm so skin stretched taut),replace the disc cover,light illuminates hard to see hairs (light comes on when you turn the unit on)