Classic analogue radio controlled alarm clock with either highlight: backlight: turns on white for a few seconds and gradually darkens. The light button is at the same time the button to use the snooze function (repeated ringing after 4 minutes elapsed. Adjustable night light function: With this function, the brightness sensor of the alarm clock activates a discreet backlight when it gets dark. This function can be easily turned on or off using the switch on the back of the alarm clock. The time and alarm settings are set in a conventional way with the dials on (also on the back of the alarm clock). To turn on and off there is a switch on the right side. The corresponding parameters are colored again (red = inactive, green = active) Dimensions: 9.2 x 10.2 x 3.8 cm For this alarm clock you need 2 x AA Mignon LR06 batteries (not included )