The Dimmermaster 412 wallmount dimmers are very compact units with four Terminal Block 1200W dimmers . The units accept DMX-512 control and analog 0-10VDC control. The starting channel is set on a thumbwheel switch, which also provides load testing and local control. A status LED indicates the presence of a DMX control signal. Each channel is protected by a circuit breaker conveniently located on the front panel for quick access. All power and control connections are made on terminal blocks. Fits in a standard 8" X 8" X 4" screw cover enclosure (not included unless selected).