MUTE BUTTON: Turn on or off the alarm sound. In the silent mode, the “volume prohibited” sign is not displayed and there is no alarm sound. The default is to turn on the sound.
BUTTON: When setting the alarm value, increase the value; power button: press and hold for 2 seconds to turn on or off the power, when the power is turned on, the number field will count down from 120.
TEMPERATURE UNIT SELECTION BUTTON: Air quality detector temperature unit selection button: conversion between Celsius and Fahrenheit.
SETTING BUTTON: Short press this button to set the alarm value of “CO2→TVOC→HCHO” in turn, display the original factory setting value and flash.
PARAMETER ADJUSTMENT BUTTON: Use the “+” button and the “-” button to adjust the parameter, the value will be automatically stored after 10 seconds.
MUTE BUTTON: Turn on or off the alarm sound. In the silent mode, the “volume prohibited” sign is not displayed and there is no alarm sound. The default is to turn on the sound. BUTTON: When setting the alarm value, increase the value; power button: p...
