Frequency Counter box

Heathkit IM-2400 Frequency Counter LED 50/500MHz POOR CONDITION BATTERY CORRODED

New PLJ‑8LED‑H RF Frequency Counter Cymometer Tester Module 0.1~1000MHz

DIY 1Hz-50MHz Digital LED Crystal Oscillator Frequency Counter Meter Tester Kit

Red PLJ-8LED-R 0.1MHZ - 2.4GHz RF Signal Frequency Display Counter Cymometer

0.1-65MHz High Precision Frequency Counter with 2.5ppm TCVCXO & 10Hz Resolution

New DC 8~15V 6-digits LED Display RF Signal Frequency Counter 0.1MHz~65MHz

0.56" 8bit LED Display RF Signal Frequency Counter Frequency Display 0.1-1200MHz