Built in change mode, you can adjust by dialing code   DMX512 address code can be set via DIP   3 relay outputs,5A per channel   Working voltage: DC12V-24V    Relay load: 5A per channel    Controller: DMX512 3P D    mx512 Data: 0-127 Relay Switch OFF,128-255 Relay Switch ON    Size: 120*55*20mm   color: blue   material: plastic   DIP10 function key (FUN).    DIP10 (FUN) is OFF, as DMX512 mode, receive standard DMX512 signal. Occupies three address code, (R, G, B for each channel), DIP1-DIP9 address code setting.    When less than 127 DMX512 data relay off    DMX512 data is greater than 127 when the relay is closed    DIP10 (FUN) is ON, the built-in change mode and does not receive standard DMX512 signal. DIP1-DIP9 to invoke the built-in effects settings.    Package Contents: 1 x Relay Switch   Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.