Features Clock: The two dots in the middle of the hour and minute of the clock status are flashing. Alarm: The two dots in the middle of the hour and minute of the alarm state do not flash; the alarm lasts for 1 minute. Temperature: range 0~50; 32~122, accuracy +/-1 , detection once every minute. Humidity: range 20%~99%, accuracy +/-5%, detect once every minute. Key tone function: all keys have key tone, and the alarm sound can reach 80 decibels. Backlight function: Press the MODE key, UP key, and DOWN key to light up for 8 seconds. Touch function: 3 function keys with touch function. Instructions for use The screen will be fully displayed for 1 second after power-on, and the temperature and humidity will be detected. The backlight will be on for 5 seconds, and enter the time state with a "beep" sound; the power-on temperature defaults to Celsius; the initial time is AM12:00. In any state, press the MODE key to switch between displaying time and alarm; when no alarm is set, the alarm state is represented by three horizontal bars (-:--), after setting the alarm time, the normal time and alarm The difference in time is (the two dots in the middle of the hour and minute of the normal time are beating, and the two dots in the middle of the hour and minute of the alarm time are still). Setting the time: In the time state, press and hold the MODE button for two seconds, and the hour starts to flash. Press the UP or DOWN button to increase or decrease the time. Press and hold the UP or DOWN button to quickly increase or decrease the hour; press the MODE button again Once, the minute starts to flash, single press the UP or DOWN key to increment or decrement the minute, long press the UP or DOWN key to quickly increment or decrement the minute. In the time state, press and hold the UP button for two seconds to realize 12/24 hour conversion. Setting the alarm: In the alarm state, press and hold the MODE button for two seconds, and the hour starts to flash. Press the UP or DOWN button to increase or decrease the hour. Press and hold the UP or DOWN button to quickly increase or decrease the hour; press again Press the MODE key once, and the minute starts to flash. Press the UP or DOWN key once to increment or decrement the minute. Press and hold the UP or DOWN key to quickly increment or decrement the minute. In the alarm state, long press the UP button for two seconds to turn on or off the alarm function. In any state, press and hold the DOWN button for two seconds to switch between Celsius and Fahrenheit. If there is no button operation for 20 seconds, it will automatically return to the time state. Precautions Do not place the product in a high temperature, high humidity or dusty environment. When the display becomes dim or the touch keys are not sensitive, please replace the battery.