Built in change mode, you can adjust by dialing codeDMX512 address code can be set via DIP3 relay outputs,5A per channelWorking 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*20mmcolor: bluematerial: plasticDIP10 function key (). DIP10 () 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 () 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 SwitchNote: Light 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.