Product link: https://chelegance.com/product/sv4401a-4-4g-vna-with-7-capacitive-touchscreen/
Firmware download:
1. https://github.com/CHELEGANCE/CHELEGANCE-VNA
2. https://chelegance.com/product/sv4401a-4-4g-vna-with-7-capacitive-touchscreen/
3. https://www.sysjoint.com/en/content/?145.html
