https://www.eeci.com/
EECI - Relay Interface, Analog to Digital, Digital to Analog - USB WIFI ETHERNET RS-232 RS-485
USB Analog to Digital - USB Digital to Analog - Relay and Control System Interface (USB, WIFI, ETHERNET, RS-232 or RS-485) - 30 YEARS OF PROVEN PERFORMANCE
analog to digital
https://source.android.com/devices/audio/usb?authuser=2&hl=id
Audio Digital USB | Android Open Source Project
audio digitalopen sourceusbandroidproject
https://toyedent.en.made-in-china.com/product/sxrpkQRJDzYE/China-HD-Quality-Wireless-Digital-USB-Endoscope-Dental-Intra-Oral-Camera.html
HD Quality Wireless Digital USB Endoscope Dental Intra Oral Camera - Intraoral Camera and Endoscope
HD Quality Wireless Digital USB Endoscope Dental Intra Oral Camera, Find Details and Price about Intraoral Camera and Endoscope from Foshan Toye Dental...
intra oral camerahd qualitydigital usb