The Gavita RS1 Remote Switch is a manual light intensity controller. It can be used to switch, dim or boost one or multiple linked fixtures at once. Easily adjust the light intensity of the lamps by just rotating the knob. The RS1 allows you to dim your lamps down to 60% or even boost your lamps up to 115% for extra light intensity. Simple to use, plug and play design which requires no additional power input to operate.