1. Temperature setting (ambient temperature required by the user): the user can adjust it on the thermostat or APP, the adjustment range is -40 to 99.9 Celsius 2. Temperature difference setting: set the difference between the heating and cooling target temperature when working at a constant temperature; for example, the target temperature is 40 Celsius, the temperature difference is set to 2 Celsius, stop heating after heating to 40 Celsius, and enter the constant temperature mode , When the temperature drops to 38 Celsius, re-enter the heating mode, this value differs by 2 Celsius, this value can be adjusted by the host or APP 3. Compressor delay: This function is generally used for compressor refrigeration. If the temperature controller is used for refrigerator freezer, this value must be set. The general setting value is 3-6 minutes according to the back pressure of the compressor. APP to adjust, the adjustment range is 0 to 10 minutes 4. Temperature correction: used to correct the temperature value currently detected by the thermostat, the correction range is 0 to 10 degrees Celsius Product name: Thermostat Product model: DTC1201 Power supply voltage: AC 110 -230V Temperature range: -40Celsius -99Celsius Temperature measurement accuracy: +/-1Celsius (-40Celsius -70Celsius) Sensor cable length: 100cm Sensor cable type: NTC Size: 93mm x 56mm x 34mm Output capacity: cooling (10A/250VAC) heating (10A/250VAC) Indicator status: Cool indicator (Cool and Heat indicators cannot be on at the same time): On: cooling work Off: cooling off Flashing: Press delay Heat indicator: On: heating work Off: heating off Set indicator: On: parameter setting status Data indicator (yellow light: distribution network indicator): Data transmission indicator Net indicator (indicating whether the APP is successfully connected to the device): On: online Blinking: offline Caveat: This thermostat is forbidden to be used in water or excessively humid environment. It is prohibited to use in high temperature, strong electromagnetic interference and strong corrosive environment. State of Assembly: Ready-to-Go colour:Black+white Material:plastic Package Contents: 2 x Wireless digital temperature controller 2 x Temperature sensor cable 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.