BK-Precision-BK-1856D-Frequency-Counter-0-1 Hz-150 M Hz-BK-Precision-BK1856D-The-BK-Precision-model-1856D-Frequency-Counter-provides-versatility-&-reliability-for-a-broad-range-of-laboratory-&-service-applications-BK-Precision-BK1856D-Frequency-Counter-0-1-Hz-150-MHz