A Personal Series LCD Clock is for indoor use only.
Depending on your security needs, there are two options to wall mount a Personal Series Clock.
Clock Lock mount: The most secure method uses the Clock Lock feature, which is a specially designed hanger at the top center of the clock. The Clock Lock is designed to prevent accidents if the clock is bumped, and it may reduce theft by requiring a particular combination of moves to remove the clock.
Standard mount: To avoid the Clock Lock feature altogether, use a finishing nail with no head angled at 45 degrees into the wall in place of headed screws and anchors. The clock can be removed like a standard clock. Use the screw and anchor provided. If you choose not to use the provided screw and anchor, you can substitute a #4 screw. The screw must protrude from the wall 1 in. (.25 cm).