0403:fa20 — Ross-Tech HEX-USB

This is the USB identifier for a Ross-Tech HEX-USB manufactured by Future Technology Devices International, Ltd. The vendor ID 0403 is registered to Future Technology Devices International, Ltd with the USB Implementers Forum, and fa20 is the product ID that Future Technology Devices International, Ltd assigned to this particular model. When you run lsusb on Linux, this device appears as 0403:fa20 Future Technology Devices International, Ltd Ross-Tech HEX-USB.

Linux

$ lsusb
Bus 001 Device 004: ID 0403:fa20 Future Technology Devices International, Ltd Ross-Tech HEX-USB

You can filter directly with lsusb -d 0403:fa20, or get the full descriptor dump with lsusb -v -d 0403:fa20. Kernel messages from dmesg show the same pair as idVendor=0403, idProduct=fa20.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_0403&PID_FA20
USB\VID_0403&PID_FA20&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0403&PID_FA20"

macOS

$ system_profiler SPUSBDataType
    Ross-Tech HEX-USB:
      Product ID: 0xfa20
      Vendor ID: 0x0403  (Future Technology Devices International, Ltd)

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page. Future Technology Devices International, Ltd official support →

The exact lines this page is generated from, in the upstream source file:

0403  Future Technology Devices International, Ltd
	fa20  Ross-Tech HEX-USB

• 0403:fa01 Matrix Orbital MX2 or MX3
• 0403:fa02 Matrix Orbital MX4 or MX5
• 0403:fa03 Matrix Orbital VK/LK202 Family
• 0403:fa04 Matrix Orbital VK/LK204 Family
• 0403:fc08 Crystalfontz CFA-632 USB LCD
• 0403:fc09 Crystalfontz CFA-634 USB LCD
• 0403:fc0b Crystalfontz CFA-633 USB LCD
• 0403:fc0c Crystalfontz CFA-631 USB LCD

See all 179 devices from Future Technology Devices International, Ltd →