Using this ETC SP - 1220BV Sensor Dimmer Rack is easy. First, unpack it carefully from the road case. Connect the stage pin and Veam output to your equipment. The D20 Dimmer Modules and CEM+ Control Module work together to adjust the lighting as you want. When using, make sure the power supply is stable. Avoid exposing it to extreme temperatures and humidity. For maintenance, clean the rack gently with a dry cloth regularly. Check the connections from time to time to ensure they are secure. If you have any problems, contact the manufacturer for help.