3838:1031 — 2.4G Wireless Mouse

This is the USB identifier for a 2.4G Wireless Mouse manufactured by WEM. The vendor ID 3838 is registered to WEM with the USB Implementers Forum, and 1031 is the product ID that WEM assigned to this particular model. When you run lsusb on Linux, this device appears as 3838:1031 WEM 2.4G Wireless Mouse.

Linux

$ lsusb
Bus 001 Device 004: ID 3838:1031 WEM 2.4G Wireless Mouse

You can filter directly with lsusb -d 3838:1031, or get the full descriptor dump with lsusb -v -d 3838:1031. Kernel messages from dmesg show the same pair as idVendor=3838, idProduct=1031.

Windows

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

USB\VID_3838&PID_1031
USB\VID_3838&PID_1031&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_3838&PID_1031"

macOS

$ system_profiler SPUSBDataType
    2.4G Wireless Mouse:
      Product ID: 0x1031
      Vendor ID: 0x3838  (WEM)

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:

3838  WEM
	1031  2.4G Wireless Mouse

• 3838:0001 5-in-1 Card Reader

See all 2 devices from WEM →