Crescendo beep alarm - The beep alarm gets more frequent and louder if you do not turn it off. Snooze / light function (Snooze interval is 5 minutes/Light illuminates for 5 seconds once manually activated) Compact size, perfect for travelling (W5.7cm x H5.7cm x D2.7cm) Quiet precision quartz movement (new generation) Luminous tipped hands + iconic yellow second hand The Braun BC02X clock requires 1 X AA battery to operate however this is NOT INCLUDED. For optimum performance of the clock time keeping, backlight and alarm, we recommend using ONLY NEW ALKALINE batteries.