Clapping hands nearby the KADIO Digital Clock, gently knocking on the table where the clock is placed, or a light touch on the clock and the LCD back-light gets turned on automatically. Projects time in large digits. The LCD screen displays 5 second backlight and easy-to-read numbers. Digital thermometer-detects automatically the surrounding temperature. Displays time, date, alarm and temperature. There’s a snooze function, too.Clapping hands nearby the KADIO Digital Clock, gently knocking on the table where the clock is placed, or a light touch on the clock and the LCD back-light gets turned on automatically. Projects time in large digits. The LCD screen displays 5 second backlight and easy-to-read numbers. Digital thermometer-detects automatically the surrounding temperature. Displays time, date, alarm and temperature. There’s a snooze function, too.