The La Crosse LCD Alarm Clock has a green display backlight that illuminates automatically in the dark. Jumbo 2 inch LCD display features a 0.5 inch calendar (month and date), display alarm time, and ascending alarm with snooze. Requires 3 AA Alkaline battery (not included). Measures 6.22 H x 2.56 W x 3.66 D in. 2 year warranty.