Press down "time" key to switch between different time functions.
Press and hold "date" key to switch to data display mode.
When setting the Alarn Clock, press "1" key to switch to "alarm 1" mode, then press "set" key to set desire alarm time, at this time "hour" display will flash.
Press ON/OFF key to switch on/off between different Alarn Clock modes.
Once Alarn Clock/Thermometer device had been switched on, local temperature will automatically be detected by the device and displayed on the LED Backlight screen.
The maximum range of temperature are from 0-50 C, the Thermometer will measure the local temperature once every minute.