In principle, the operation of the alarm is silent, however, make the key when you press a sound like closing a push button. The alarm time can be on the button AL1 or AL2 and adjust the +/- keys relatively comfortable. The illumination of the display remains switched on automatically as long as you adjust the alarm time - at least as long as you hold down any button for more than 5 seconds. Specifically: The light turns off when you want to adjust the minutes with a long keypress by more than 25 min. To turn off the alarm prematurely, you have twice (when snooze only once) press AL1 or AL2. The snooze function can be disabled via the button AL1 or AL2 in advance. The alarm has a good, medium-loud sound, only more slowly, then more quickly, but without crescendo. The time is easy to read during the day, at night also, but only if the alarm is set slightly lower than eye level. The display is illuminated perfectly. The alarm clock has an overall quite quality impression. In my search for a radio alarm clock I've tested 26 radio alarm clock. If you're interested, you can test all 26 Funkwecker under "Articles" read on stefanrohloff.de.