Temp Control, W77 x H35mm, 3 digit display,3CH input(NTC)[Inlet Temperature + Defrost Temperature + Outlet Temperature or Digital Input(DI)], input(NTC or RTD)[Inlet Temperature + Digital Input(DI)] Compressor + Defrost + Auxiliary(Alarm/Evaporator-Fan)output, Compressor 5A 1a Contact, RS485 Communication + RTC(Real Time Clock), 100-240VAC 50/60Hz