Specifications Condition: 100% Brand new and high quality Material: ABS + Metal Color: Black Size: around 79*44*26mm Working voltage: DC 6V-30V Test temperature: -50~110℃ Control precision:0.1℃ Sensor length: 0.5 meter Temperature Sensor:NTC-10K B3950 Control Load Current:10A(Max) Features: LCD display; Power-down memory function; Emergency stop function; Real-time display temperature; Automatically save parameters; Support Heating and Cooling work mode; High temperature buzzer alarm; Work status indicator; Independent of parameters; With case, beautiful and practical; It is a digital temperature controller module.LCD display, very clear, easy to use, powerful.It can be widely used at Smart home,Industrial control,Automatic irrigation,Indoor ventilation.Protection equipment. Work Mode: 1>.’ H ’: Heating mode. Relay will turn ON and the heating device starts to work when Current Temperature Value is less than Setting Temperature Value - Return Temperature Value. Relay will turn OFF and the heating device stops to work when Current Temperature Value is more than Setting Temperature Value. 2>.’ C ’: Cooling mode. Relay will turn ON and the cooling device starts to work when Current Temperature Value is more than Setting Temperature Value + Return Temperature Value. Relay will turn OFF and the cooling device stops to work when Current Temperature Value is less than Setting Temperature Value. 3>.’ OPH ’: ON/OFF delayed start. The system starts timing 'T' when a normal heating or cooling operation is completed.The system will begin the next round of heating or cooling only after 'T'>'OPH'. 4>.’ OFE ’: Temperature correction function(-10.0~10.0℃). If the module works for a long time, there may be deviations. Corrected by this function. Actual Temperature Value = Current Temperature Value + Calibration Value. 5>.’ ALA ’: Set high temperature alarm. Module will turn on the sound and light alarm and relay will OFF at the same time when Current Temperature Value is more than Set Alarm Temperature Value.Any button to stop the sound and light alarm.