Control ELIWELL ID 974 Electronic controller for refrigeration units with three relays for compressor, defrost and evaporator fans control. Quick and easy rack instalation.Inputs:  two inputs NTC or PTCOutputs:  two outputs 8A or 15ARange:  -50 ~ 140° CSize:  front 74x32 mm, depth 60 mmPower:  230V or 12V AC/ DC