Triplett WiFi Hound 2.4 GHz and 5 GHz Wireless Network/RF Spectrum Analyzer to Visualize and Troubleshoot Wi-Fi Issues for Smart Homes, Businesses, and More (WFHOUND): Amazon.com: Industrial & Scientific
What Can A $30 USB Spectrum Analyser Do For Me? | Hackaday
Spectrum Analyzer Usb Vector Network Analyzer 4 inch LCD Screen HF VHF UHF 1.5GHz Antenna Measuring Instrument For NanoVNA H4| | - AliExpress
Oscium Dual Band WiFi Spectrum Analyzer 2.4 & 5 GHz