["✅ 【Mute button】 Turn the alarm sound on or off. In silent mode, the \"volume forbidden\" sign is not displayed and no alarm sound is emitted. By default, the sound is turned on.","✅ 【Button \"+\"】 Increase the value when setting the alarm value. Power switch: Hold this button for 2 seconds to turn the device on or off. When the device is turned on, the number field counts down from 120.","✅ 【Selection button for the temperature unit of the air quality detector】 Conversion between Celsius and Fahrenheit.","✅ 【Setting button】 Press this button briefly to set the alarm value of \"CO2 → TVOC → HCHO\". Display the original factory setting value and blink.","✅ 【Data storage function】 Use the \"+\" and \"-\" buttons to set the parameter. The value will be automatically saved after 10 seconds.","","","",""]
