Radio-controlled - This Braun watch is automatically set and controlled via DCF radio signal for the Central European Time zone. This covers most of Central and Western Europe, including Germany, France, the Netherlands, Belgium, Denmark, Switzerland, Northern Italy, and more. Not suitable for use in the UK or Ireland. For use in countries where the radio signal cannot be received by the watch, the radio function can be turned off and the watch can be set manually. The rotating ring allows for quick adjustment of the time and alarm. Turning the ring clockwise advances the time, while turning it counterclockwise sets it back. Crescendo beep alarm - The beep alarm becomes more frequent and louder if not turned off. Snooze/light function (snooze interval: 5 minutes, light stays on for 10 seconds after manual activation). Reverse LCD display with 12-hour/24-hour setting option. The digital display may vary in contrast depending on the room lighting.