Switch the modes between cool and heat; Control temperature by setting the temperature setting value and the difference value; Temperature calibration;efrigerating control output delay protection; Alarm whentemperature exceedstemperature limit or when sensor error. Type:Voltage Regulator Supply Voltage:220V Model Number:STC-3000 sensor length: Im (include the probe) Temperature measuring range: 50C-99Celsius Resolution: 0.1Celsius Accuracy:+1 C(-50Celsius-70 Celsius) sensor error delay: l minute Power supply: 110V/220VAC+10%, 50/60Hz Power consumption: Less than 3w Relay contact capacity: Cool(10A/250VAC); Heat(10A/250VAC) Ambient temperature: 0Celsius-60 Celsius Storage temperature: -30Celsius-75 Relative humidity: 20-85%(No condensate) Colour:Black Material:ABS Package Contents: 2 x Temperature Regulator 2 x vinyl probe line Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.