The UD series includes various time and date displays. The UD can display Time Code, local time, a different time zone or a stopwatch timer. A built-in quartz clock enables continuous operation even if a drop out of signal occurs. All displays of the type UD56 show hours, minutes and seconds, in a six-digit format. The digit height is 56 mm. UD56S displays also feature an additional seconds ring. The LEDs feature three selectable colors (red, green, yellow) and an adjustable brightness selector. The brightness can be adjusted manually or can set to an automatic mode, where a photo sensor automatically adjusts the brightness depending on the current level of environmental light. Various universal interfaces are included, which enable a wide assortment of data or Time Codes to be displayed.