Addressable Network POE Multi-Function Digital Number Display. 6 Digit, 4 inch, countdown timer 99:59:59, Count up timer 0 -99:59:59, 12-24 Hour clock, static numbers 00:00:00, with blanking feature. Similar product: DC-40N-T-DN-UP-STATIC. Note: See also our RS-232 or RS-485 serial controlled displays below. DC-Digital allows for any serial type controllers to easily send commands (free protocol) to make them an up timer, down timer, a static display or simply a time of day clock all in one package!