The 8900-0C184 is a 1.8-inch, four digit red super-bright LED clock/timer/display module. Standard ATS clock/timer modules display time in 12 or 24 hour formats. Control options include on-board push buttons for setting time, sync input for external synchronization such as 59th minute and midnight/noon correction, and serial data inputs (TTL and RS232) for sending time and data from a computer or master clock.