It hangs on a wall and shines like the moon, but only in the dark. Use the remote to choose how it shines: full moon, favorite phase, or waxing and waning (the phase will change every 5 seconds and cycle through all 12). You can also set your moon to match the real moon in the sky. 10" diameter, 2¾" deep to stand out from the wall. Keyhole on back. ABS plastic, authentically detailed. Takes 4 AA and 2 AAA batteries (not included).