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Specification: Output: 10A delay Power Supply: DC 12V Size: 65mm*55mm*28mm Humidity Range:0~100%RH Test Probe: Integrated sensor Controller Precision:0.1℃ 0.1%RH Temperature Measurement Range: -40℃~120℃ Instructions for use: 1. Set the temperature (+): Normal display mode, long press the (+) key for 3 seconds, start temperature numerical flashing, press the + / - key setting values. Incorrect operation after 5 seconds, automatically return to detect temperature display . 2. Set the temperature (-): Normal display mode, long press (-) button for 3 seconds, stop numerical flashing temperature, press the + / - key set value . 3. Restore the factory settings: At the same time long press temperature, and humidity (+) key for 3 seconds, digital display is 888888 . 4. Set the start temperature: Long press the (+) key, start the flashing temperature, set start temperature by + / - key . 5. Set stop temperature: Long press (-) button, stop flashing temperature, set stop temperature by + / - key . 6. Set to start humidity: Long press the (+) key, start the humidity value flashing, set by + / - key launch humidity value . 7. Set stop humidity: long press (-) to stop humidity value, set by + / - key to stop the humidity value. Note: When setting the mode, if the set temperature value setting is reversed, the output indicator will not light and the load will not work. Package Included: 1 x XH-M452 Thermostat Temperature Humidity Control Thermometer Hygrometer Controller Module Dual Output DC 12V LED Digital Display