Easy to read, day or night, this La Crosse Technology 513-1419BL-INT Atomic Calendar Clock makes a terrific gift. Its time digits measure 2 inch tall, its day of the week reading measures 1 inch and it features a nighttime backlight for easy visibility. This La Crosse Technology atomic clock is lightweight, made of durable plastic and simple to operate. It includes an AC adapter and can also run on two AA batteries (not included). It keeps your time accurately set according to any one of seven U.S. time zone settings. The low power indicator icon lets you know when its batteries will need changing.