JUNSUNMAY USB LED Touch Inline Dimmer Switch Controller for Single Color, Length 30cm(White)1. Operation Description: When the finger touches for the first time, the light will light up. When the hand touches again, the light will turn off When the finger touches for a long time, the light will slowly turn on from off. When the hand leaves, the light will slowly turn off. 2. This LED dimmer controls 0% 100% brightness by touch sensitive on off controller. It is suitable for human sensor lights, soft light strips, counter lights, wall lights,