and high quality Switch the modes between cool and heat; Control temperature by setting the temperature setting value and the difference value; Temperature calibration; Refrigerating control output delay protection; Alarm when temperature exceeds temperature limit or when sensor error. Technical Parameters: 1.Temperature measuring range: -50 Celsius ~ 99 Celsius 2.Resolution: 0.1 Celsius; 3.Accuracy: +/- 1 Celsius (-50 Celsius ~ 70 Celsius); 4.Sensor error delay: 1 5.Power supply: AC110-220V 50/60Hz 6.Power consumption: less than 3W; 7.Sensor: NTC sensor (1PC); 8.Relay contact capacity: Two Relay Cool 10A/220VAC; Heat 10A/220VAC; 9.Ambient temperature: 0 Celsius ~ 60 Celsius; 10.Storage temperature: -30 Celsius ~ 75 Celsius; 11.Relative humidity: 20% ~ 85% (No condensate) Colour: black Material: plastic Size: 75*85*35mm Package Contents: 1 * temperature controller 1 * temperature sensor Safety Regulations Danger: 1.Strictly distinguish the sensor down-lead, power wire and output relay interface from one another, and prohibit wrong connections or overloading the relay. 2.Dangers: Prohibit connecting the wire terminals without electricity cut-off. Warning: Prohibit using the machine under the environment of over damp, high temp., strong electromagnetism interference or strong corrosion. Notice: 1.The power supply should conform to the voltage value indicated in the instruction. 2.To avoid the interference, the sensor down-lead and power wire should be a distance. Only the above package content, other products are not included. Note: Light 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.