Main function: Switch the modes between cool and heat Control temperature by setting the temperature set value and the difference value: Temperature calibration; Refrigerating control output delay protection; Alarm when temperature exceeds temperature limit orwhen sensor error. Specification: Technical parameters: Temperature measuring range: -50~99 Resolution: 0.1 Accuracy: 1(_50~70) Power supply: DC12V Power consumption: Less than3W Sensor.NTC sensor(1PC) Relay contact capacity: Cool(10A/220VAC); Heat(10A/220VAC) Ambient temperature: 0~60 Storage temperature: -30~75 Relative humidity: 20~85%(No condensate) Material: abs colour: As shown Package Contents: 1 x Thermoregulator 1 x Cable Only the above package content, other products are not included. Note: Light reflection 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.