Voice Control The LED screen will be wake up when it detects the sound over 90 dB like when you clap your hands, knock on the table or touch ''SNOOZE/LIGHT''. The display switches off automatically after 6s. It is more convenient for your life 12-24H Switch & Temperature Display At the normal time of state display, press the "12/24" key to change the time format between 12H and 24H. You can switch to display C (Fahrenheit) or F (Celsius) temperature via UP button Several Kinds of Ringtones The alarm clock with several natural sounds options, there's always one you like. Press the alarm setting button to enjoy and change the music.