Say hello to the Dosy FC50 Digital Frequency Counter, your trusty sidekick for all your antenna tuning needs. With its 6-digit blue LED frequency counter, you'll get ultra-accurate readings, plus SO239 input/output connectors for maximum connectivity. Ready to take it up a notch? The Dosy can measure signals from .5 MHz all the way to 50 MHz, level from .1 to 1V max -- just grab your radio and get ready to talk.