https://gitlab.com/defcronyke/signal-gen-cjds66
Copyright © 2020-2021 Jeremy Carter jeremy@jeremycarter.ca
By using this software, you agree to the LICENSE TERMS outlined in the file titled LICENSE.md contained in the top-level directory of this project. If you don't agree to the LICENSE TERMS, you aren't allowed to use this software.
This is an unofficial project which fully implements the official communication spec for the DDS Signal Generator and Counter device known as the "Koolertron Upgraded 60MHz DDS Signal Generator Counter, High Precision Dual-channel Arbitrary Waveform Function Generator Frequency Meter 200MSa/s (60MHz) Model: GH-CJDS66-FU" (less a few spec errata, which you can read about in a commit message here: 713b026a4e10807d23f7436d26649dcc4c584019)
Manufacturer page with info on where to buy it:
https://www.koolertron.com/koolertron-upgraded-60mhz-dds-signal-generator-counterhigh-precision-dualchannel-arbitrary-waveform-function-generator-frequency-meter-200msas-60mhz-p-867.html
Linux lsusb output:
shell
ID 1a86:7523 QinHeng Electronics CH340 serial converter