WITRN-U2

timotv

USB tester WITRN-U2 (former WEB-U2) is very similar to AVHzY CT-2. Both has same microcontroller.
https://mysku.ru/blog/aliexpress/67123.html
https://diykitsblog.com/obzory-i-testy/u2-usb-tester-witrn.html  ( https://www.youtube.com/watch?v=bwXAR55-P9Q )
http://www.witrn.com
https://ru.aliexpress.com/item/Q ... dc/32938373408.html
At the same time it costs half as much.
Why it is so ?
Besides, AVHzY CT-2 is similar to Kotomi:
https://ru.aliexpress.com/item/T ... er/32828429764.html