Near field receiver, Frequency counter up to 2800 MHz
Trio Frequency Counter FC-756 Freq Range 6111146512129 | eBay
Amazon.com: Ranjaner 1Hz-50MHz Frequency Counter Kit, DIY Module Board for Oscillator, Crystal Measure Frequency Meter Accessories : Industrial & Scientific
53220A - Keysight Technologies - Frequency Counter, 1MHz to 350MHz, 12 Digits
Frequency counter - Wikipedia
Agilent 53181A RF Frequency Counter | TEquipment
S53MV Counter Main
VC-3165 Precision Frequency Counter 0.01 Hz - 2.4 GHz – Gain Express
FC-2800M Portable Frequency Counter 2MHz - 2.8GHz — LATNEX
Sinometer VC3165 High Resolution Frequency Counter | eBay
53200 Series RF and Universal Frequency Counter / Timers | Keysight
Frequency Counter - an overview | ScienceDirect Topics