Features: OOTDTYThis product is an upgraded version of W1308. Added Celsius and Fahrenheit Conversion FunctionFully sealed, waterproof and saferApplication:Refrigerator freezer, display case temperature control, plastic greenhouse, incubator, medical equipment, pet house, planting and breeding, electrical control cabinet cooling, ventilation containers, reptile insulation, EPS incubator, sauna, PC enclosures, civil and industrial equipmentEasy and convenient to useSpecifications:Temperature control range: -50 - 120° Measurement Accuracy: 0.1° Control Accuracy: 0.1° Hysteresis Accuracy: 0.1°C Refresh Rate: 0.5 SMinlet Voltage: AC 110V - 220V Measurement Inputs: NTC (10K 0.5%) 0.5W Waterproof Sensor Output: 1 Output Channel Relay, Capacitance = 10A Environmental Requirements: -10 - 60° Humidity 20%-85% Size: 10*4.8*2.5cm Work Light: RedPackage Included:1 x Temperature Control Switch-User GuideCelsius & FahrenheitPress and Hold C/F button for three seconds, C mode is changed to F mode, the corresponding indicator light is on, and then the C/F button is pressed for three seconds. Mode F is changed to Mode C, the corresponding indicator light is illuminated and the shutdown function is saved. Quick setup1. Specify ModePress and hold SET for about 5 seconds to display P0, press SET again to display the mode. Press +-switch mode, H is heating mode, C is cooling mode2. Set Difference :Hysteresis is also how much it drops when the set temperature stops. The default is 2If you want to modify, press and hold SET and let go for about 5 seconds to display P0, press +- to switch P1, press ST again to display the difference, press +- to set the difference back.3. Set the temperature: After setting the mode and hysteresis, press ENT to confirm the return. During this time, the screen displays the temperature in real time. Press the SET screen button once and press the +- button to set the desired temperature. Table codeP0: working mode (range: H/C) (default: C)P1: hysteresis setting (range: 0.1-30) (default: 2.0)P2: setting limit is high (range: +120) (default: 120)P3: low setting limit (range: -55) (default: -55)P4: temperature correction (range: +10 -10) (default: 0)P5: delayed start (range 0-10 minutes) (default: 0)P6: high temperature alarm (-55 - 120) (default: off)P7: Data lock (on - off) (default: off)P8: restore factory settings (on - off) (default: off)In the off state, press and hold the up and down keys to quickly restore factory settings.