Specifications: Long press "Set" for 5 seconds to enter the internal parameter setting, press up and down to switch, press "Rst" to confirm and return. P0 Cooling and Heating Mode: Please set to C for high temperature start as cooling mode. Please set to H for low temperature start as heating mode. P1 Hysteresis Setting: In Heating Mode (H): measured value ≤ set value - in the case of hysteresis, start the output heating to the set value and stop. In Cooling Mode (C): measured value ≥ set value + in the case of hysteresis, start the output cooling to the set value and stop. P2 High Setting Range: the high value does not exceed this value when setting the temperature. P3 Low Setting Range: the low value is not lower than this value when setting the temperature. P4 Temperature Correction: When there is a deviation between the measured temperature and the standard temperature, you can use this function to correct. The corrected temperature = the temperature before correction + the corrected value. P5 Delay Start Time Unit: Minute When controlling the refrigeration of the compressor equipment, the delay time can be set as required. The equipment will not start immediately when the controller outputs, and it can only start after running the set delay time. P6 High Temperature Alarm: When the measured value is more than this value, the screen will display "---" and beep alarm, and the output will be forcibly disconnected. P7 Data Lock Function: Turn on the data lock to keep the current setting unchanged. At this time, the set temperature and function are invalid. If you need to modify it, you need to turn off the data lock function. P8 Restore Factory Settings: Long press "SET" to switch to P8, press "SET" once to set to "on", press "Rst" to restore factory settings. You can also press and hold the "+" "-" key for power-on self-test and restore factory settings. Item Name: Smart Temperature Controller Material: ABS Rated Voltage: 110-220V AC, DC 12V, DC 24V Measuring and Controlling Temperature Range: -50 Degree Celsius to +110 Degree Celsius Resolution: 0.1 Relay Output Contact Capacity: Heating: 10A/240V AC, Cooling: 10A/240V CA Accuracy: ±1 Degree Celsius Product Models: 1#: 12V, 2#: 24V, 3#: 110V-220V Features: Digital Display, Intelligent, Durable Sensor Cable Length: 1m/39.37" (Approx.) Product Size: 8.5cm x 7.5cm x 3.45cm/3.35" x 2.95" x 1.36" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Temperature Controller 1 x Sensor