... 4.8digits LED display MCH Frequency Counter, HC-F1000L Frequency Counter Features Range HC-F1000C:1Hz~1GHz,Max.up to 1.5GHz ... HC-F1000L:10Hz~1GHz,Max.up to 1.8GHzPeriod,totalize measurement ... (110V optional)*Specifications are subject to change without prior notice. HC-F1000L Frequency Counter, digital frequency counter, from 10Hz-1000MHz continuously ...