Measures:11.81" X 11.81"; Thickness: 0.2" (only the board). Material: MDF wood (not solid wood), wood particle board covered with drawing paper. No frame or glass cover. "IIII" has been used in place of "IV" on dials for several hundred years in fact. It's really a question of aesthetics and symmetrical visual balance. A long time ago, someone noticed that using this at 4 o'clock not only made a dial look better visually, but helped with readability when looking at the dial from different angles. It's what we call a “watchmaker’s four” and it is used for these reasons. SILENT: Quartz mechanism high quality silent, keeps accurate time.Unchecked function is suitable for bedroom, living room, computer room, cafe, office, conference room. The clock hands may become detached during transportation, which may cause the clock hands to appear "not working." Please remove them first, then put them in place to eliminate "false faults", if necessary. Battery operation : powered by 1 AA battery