043e:9a39 — 27UP850 - WK.AEUDCSN - External Monitor 4K

This is the USB identifier for a 27UP850 - WK.AEUDCSN - External Monitor 4K manufactured by LG Electronics USA, Inc.. The vendor ID 043e is registered to LG Electronics USA, Inc. with the USB Implementers Forum, and 9a39 is the product ID that LG Electronics USA, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 043e:9a39 LG Electronics USA, Inc. 27UP850 - WK.AEUDCSN - External Monitor 4K.

Linux

$ lsusb
Bus 001 Device 004: ID 043e:9a39 LG Electronics USA, Inc. 27UP850 - WK.AEUDCSN - External Monitor 4K

You can filter directly with lsusb -d 043e:9a39, or get the full descriptor dump with lsusb -v -d 043e:9a39. Kernel messages from dmesg show the same pair as idVendor=043e, idProduct=9a39.

Windows

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

USB\VID_043E&PID_9A39
USB\VID_043E&PID_9A39&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_043E&PID_9A39"

macOS

$ system_profiler SPUSBDataType
    27UP850 - WK.AEUDCSN - External Monitor 4K:
      Product ID: 0x9a39
      Vendor ID: 0x043e  (LG Electronics USA, Inc.)

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.

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

043e  LG Electronics USA, Inc.
	9a39  27UP850 - WK.AEUDCSN - External Monitor 4K

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See all 21 devices from LG Electronics USA, Inc. →