Easy to read, day or night, this wall clock makes a perfect gift. With its large display, easy to operate set up, a beautiful color finish, illuminated lighted screen, and offers so much more. Time digits measure 2 1/2" tall and calendar weekday is 1". made of durable plastic, in a walnut finish, you can hang the clock on the wall or place on countertop. Simple operation, just hold mode button to begin easy set up. Select your local time zone and clock does the rest. Automatically sets to the world's most accurate atomic signal. Choose from different screen views using the mode button. Continuous backlight feature uses included AC adapter or operation on-demand using 2 AA batteries (not included.) 2 minute crescendo alarm wakes you or press snooze to silence for extra 10 minutes. Indicator icon will flash zz until alarm beeps again. Low power indicator icon lets you know when batteries will need changing.