Measurements:11.81" X 11.81'; Thickness: 0.2" (only the board). Material: MDF wood (not solid wood), particle board covered with drawing paper. No frame or glass cover. "IIII" is used instead of "IV" on dials for several hundred years in fact. It's really all about aesthetics and symmetrical visual balance. A long time ago someone noticed that using this at 4 o'clock not only made a dial better visually, but helped with readability when looking at the dial from different angles. This is called a "watchmaker's four" and is used for these reasons. SILENT: High quality silent quartz mechanism, keeps the 39; precise time. Unchecked function is suitable for bedroom, living room, computer room, cafe, office, conference room. Clock hands may come off during transport, which may give the impression that they are 'not working'. Please take them out first, then put them back in place to eliminate 'false faults', if necessary. Battery operation: powered by 1 AA battery (carbon battery- zinc