Intervolt SLD Switch mode Dimmer, 9 to 33V DC, 16.5 Amps, for dimming one DC lighting circuit with multiple momentary push-button switches. The Intervolt SLD Switch mode Dimmer contains all the features demanded by the marine, RV & motor coach enthusiast. Designed for dimming DC (filament lamp) lighting circuits & compatible with some LED products that lack specific built-in dimmer interface electronics. Enclosed in a sleek, thermally-efficient marine-grade housing featuring a heavy-duty corrosion resistant terminal block with insulated barriers to prevent shorting. A selectable master/slave switch enables multiple units to be connected in parallel for unlimited power capacity! These marine lighting dimmers are controlled by any "normally-open" single pole single throw momentary switches (any brand). Features of the Intervolt SLD Dimmer include: