... and it has the function of temperature display, temperature controlling, boot delay protection of compressor, temperature sensor error alarm. It contains ... 10% 50Hz (Refer to the wiring diagram)Operating Environment: temperature -10C~45C,humidity≤85%.Relay contact capability:20A/250VAC ... (pure resistive load)Temperature Sensor: NTC R25=5kΩ, B (25/50) = ...