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:Soft-start function: Prolongs Bulb Filament LifeMemory function that records last light-level setting so same brightness is resumed when turned on againMaster/slave function that allows either dimmer to act as the master or the remote allowing unlimited power potentialMulti-voltage capable (9 to 33V DC)Supports unlimited numbers of momentary push-button switchesDiagnostic indicator via color code LED (standby mode, load on, short circuit & over temperature warningProtections: Transient voltage, short circuit & over temperatureHousing Finish/Material: Marine-grade anodized aluminum with polycarbonate-PC end capsDimensions: 4.73" x 3.15" x 1.58"Dimmer Type: Remote/Digital/Push-ButtonInput Voltage Range: 9 to 33V DCPower Capacity: 12V/200 Watts, 24V/400 WattsPower Stacking: Yes, unlimitedOperating Temperature: -25 to 45 Deg CDimming Voltage Range: 10 to 98% of input voltageStandby Current Draw: