The ES-192UE (12 hour) /ES-194UE (24 hour) is a low-cost Master Clock for applications not requiring GPS or temperature controlled stability. Like the LX-192UE/194UE, the ES-192UE/194UE uses the AC line-frequency as a time reference or, optionally, a quartz crystal timebase may be specified. Time & Date data are output to Slave displays via the TC90™ Time Code output. The unit automatically compensates for Daylight Saving Time but this may be defeated by means of an internal solder jumper. The 12 or 24 hour format may be similarly changed.