Atomic clocks track time through a complex system of evaluating the vibration of atoms. "Atomic clocks" sold for home and office use are actually "radio clocks" that receive long-range radio signals from satellites broadcasting the time from reference atomic clocks in a selected time zone. These clocks keep highly accurate time that is not subject to the mechanical delays often affecting other clocks. Seiko makes a series of decorative, radio wall clocks under the Seiko R-Wave name.
Lay the clock face down on a work surface.
Press in the battery cover retaining clip and "pop" the cover out of place to reveal the battery compartment.
Install a AA battery into the battery compartment making sure to match the battery end marked positive ("+") with the side of the compartment marked with the same symbol.
Place the battery cover back over the compartment and push down on the cover until the retaining clip locks into place.
Set the clock manually by pressing down and holding the time zone button (the left-side button above the battery compartment) until the correct zone is shown in the digital display on the back of the clock. Press and hold the right button until the time display advances to the correct time. Release the button and the quartz movement will keep time until a radio connection is established. The clock will automatically correct the time in accordance with the radio communication.