Inexpensive RF Spectrum Analyzers for Wireless Mics!
Simple Spectrum Analyzer with Antenna USB Cable A Type 2.4G Frequency Handheld Mini 0.96inch LCD Screen Signal Measurement: Amazon.com: Industrial & Scientific
NetAlly NXT Portable Spectrum Analyzer, USB based 2.4GHz 5.0GHz (NXT-1000)
USB-SA44B — 4.4 GHz Spectrum Analyzer | Signal Hound
Amazon.com: Global Marketing Partners Wi-Spy DBx - USB Spectrum Analyzer (No Software Included) - 2450X3V : Electronics
Tektronix RSA507A 9kHz-7.5GHz Portable USB Real Time Spectrum Analyzer
iFrogLab 2.4G Spectrum Analyzer USB dongle - iFrogLab
City Theatrical 5988 RadioScan Spectrum Analyzer, 2.4GHz | Full Compass Systems
5G Signal Meter and Spectrum Analyzer 50 KHz - 6.1 GHz
RF Explorer - 2.4GHz Handheld Digital Spectrum Analyzer
2.4GHz Portable Spectrum Analyzer USB Dongle
Simple Spectrum Analyzer with Antenna USB Cable A Type 2.4G Frequency Handheld Mini 0.96inch LCD Screen Signal Measurement: Amazon.com: Industrial & Scientific