This Acctim tenma radio controlled jumbo LCD alarm clock features dual band MSF/DCF radio controlled function for fully automatic set-up and adjust to summer/winter time changes, jumbo LCD display. If you struggle with night-time viewing, this clock also includes an all night backlight for easy time viewing. It features a crescendo alarm with snooze function for sneaky couple of extra minutes. This clock is practical and ideal for any bedroom! Battery operated 3 x AAA (not included).