GS28 is with luxurious design of case,2U alloy panel,humanized handles. Built in 16 channels fo national standard power which supplies 220 voltage.each channel is with high performance system power---highly save.,extremely pure. It provides comprehensive power management solution for professional audio broadcasters.digital control and operation of surge,protection of over current and undervoltage.2 individual groups of modulations,each group has 8channels of separated cable. Multi-level low pass filter.time turn on/off. The valid power management host and adjacent devices.smart controller connects to GS8000,GS6000A,LED indicates working status.