aaaa:8816 — microSD CardReader

MXT

Vendor ID: aaaa
Product ID: 8816
Combined: aaaa:8816
Decimal: 43690:34838

What is this device?

This is the USB identifier for a microSD CardReader manufactured by MXT. The vendor ID aaaa is registered to MXT with the USB Implementers Forum, and 8816 is the product ID that MXT assigned to this particular model. When you run lsusb on Linux, this device appears as aaaa:8816 MXT microSD CardReader.

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID aaaa:8816 MXT microSD CardReader

You can filter directly with lsusb -d aaaa:8816, or get the full descriptor dump with lsusb -v -d aaaa:8816. Kernel messages from dmesg show the same pair as idVendor=aaaa, idProduct=8816.

Windows

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

USB\VID_AAAA&PID_8816
USB\VID_AAAA&PID_8816&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_AAAA&PID_8816"

macOS

$ system_profiler SPUSBDataType
    microSD CardReader:
      Product ID: 0x8816
      Vendor ID: 0xaaaa  (MXT)

Driver help

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.

Raw usb.ids entry

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

aaaa  MXT
	8816  microSD CardReader