04cf:9920 — CS8819A2-114 Mass Storage Device

This is the USB identifier for a CS8819A2-114 Mass Storage Device manufactured by Myson Century, Inc.. The vendor ID 04cf is registered to Myson Century, Inc. with the USB Implementers Forum, and 9920 is the product ID that Myson Century, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 04cf:9920 Myson Century, Inc. CS8819A2-114 Mass Storage Device.

Linux

$ lsusb
Bus 001 Device 004: ID 04cf:9920 Myson Century, Inc. CS8819A2-114 Mass Storage Device

You can filter directly with lsusb -d 04cf:9920, or get the full descriptor dump with lsusb -v -d 04cf:9920. Kernel messages from dmesg show the same pair as idVendor=04cf, idProduct=9920.

Windows

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

USB\VID_04CF&PID_9920
USB\VID_04CF&PID_9920&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04CF&PID_9920"

macOS

$ system_profiler SPUSBDataType
    CS8819A2-114 Mass Storage Device:
      Product ID: 0x9920
      Vendor ID: 0x04cf  (Myson Century, 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:

04cf  Myson Century, Inc.
	9920  CS8819A2-114 Mass Storage Device

• 04cf:8811 CS8811 Mass Storage Device
• 04cf:8813 CS8813 Mass Storage Device
• 04cf:8818 USB2.0 to ATAPI Bridge Controller
• 04cf:8819 USB 2.0 SD/MMC Reader

See all 8 devices from Myson Century, Inc. →