Measure frequencies with confidence using the KKMOON Digital Frequency Counter Tester! Designed for electronics hobbyists and radio enthusiasts, it measures signals from 1Hz to 50MHz and helps test crystal oscillator frequencies. The clear LED display, automatic range switching, programmable frequency adjustments, and protective transparent case make it a handy tool for DIY electronics projects. Supports USB, 5–12V external power, or a 9V battery (not included).
