ES-182U / ES-184U
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The ES-182U(12 hour)/ES-184U(24 hour) is a stand-alone clock for applications not requiring GPS or temperature controlled stability. The ES-182U/184U uses the AC line-frequency as a time reference or, optionally, a quartz crystal timebase may be specified. Set, Select and Date controls are accessible on the rear of the case (or on the front panel when the Rack Mount option is ordered).