Automatic Mode Function First Select The Heating Mode/Cooling Mode; Set The Temperature And Hysteresis, If You Need To Delay The Start, Then Set The Delay Start Time; If You Need To Set The High And Low Temperature Alarm, Then Set The High And Low Temperature Alarm By Yourself Threshold.Heating Mode When The Detected Temperature (Current Temperature) Set Temperature - Hysteresis Temperature, The Relay Is Turned On, And The Heating Device Starts To Work; When The Detected Temperature (Current Temperature) The Set Temperature, The Relay Is Disconnected, And The Heating Device Stops Working ;Set The Temperature At 30C, And The Hysteresis Temperature At 5C;When The Temperature Is 20C 25C (30-5 = 25), The Relay Pulls In And Starts Heating, When The Temperature Reaches 30C The Set Temperature 30C, The Relay Turns Off And Stops Heating; Delayed Start Function After A Heating/Cooling Process Is Over, How Long Is The Delay (Unit: Second) To Allow Heating/Cooling;Temperature Correction Function: The System Works For A Long Time, And Deviations May Occur. Through This Function Correction, The Current Temperature = Measured Temperature + Calibration Value Emergency Function (Emergency Stop Function): After The Emergency Stop Is Turned On, The Relay Will Be Disconnected No Matter What State It Is In; After The Emergency Stop Is Turned Off, The Relay Will Return To Normal State; Of Cooling ModeWhen The Detected Temperature (Current Temperature) Set Temperature + Hysteresis Temperature, The Relay Is Turned On, And The Refrigeration Equipment Starts To Work; When The Detected Temperature (Current Temperature) Set Temperature, The Relay Is Disconnected And The Refrigeration Equipment Stops Working;Example: Set The Temperature To 30C, And The Hysteresis Temperature To 5C;When TheTemperature Is 36C 35C (30+5 = 35), The Relay Pulls In To Start Cooling, And When The Temperature Reaches 30C The Set Temperature 30C, The Relay Turns Off And Stops Cooling; High And Low Temperature Alarm Function Buzzer On And Off: After It Is Turned On, The Buzzer Will Sound After An Alarm, And The Buzzer Will Stop Sounding After Pressing The Button; High Temperature Alarm: After The High Temperature Alarm Is Turned On, The Relay Is Disconnected When The Current Temperature Is Higher Than The High Temperature Alarm Temperature; Low Temperature Alarm: After The Low Temperature Alarm Is Turned On, The Relay Is Disconnected When The Current Temperature Is Lower Than The Low Temperature Alarm Temperature; In Automatic Mode, Can The Product Be Disconnected And Run Offline? In The Automatic Mode, After The Parameters Are Set, The Product Can Run Offline Without , And The Parameters Will Not Be Lost When The Power Is Turned Off. Lan Data Export Function A Piece Of Temperature Data Will Be Uploaded To The Lan In 1 Second, And After Clicking "Export", It Will Be Automatically Exported To Excel For Analysis Of The Temperature Data Colour:black Material:plastic Size:6.5 x 3.4cm Package Contents: 1 x Thermostat Module 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.