0525:a4a4 — Linux-USB user-mode bulk source/sink

Netchip Technology, Inc.

Vendor ID: 0525
Product ID: a4a4
Combined: 0525:a4a4
Decimal: 1317:42148

What is this device?

This is the USB identifier for a Linux-USB user-mode bulk source/sink manufactured by Netchip Technology, Inc.. The vendor ID 0525 is registered to Netchip Technology, Inc. with the USB Implementers Forum, and a4a4 is the product ID that Netchip Technology, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 0525:a4a4 Netchip Technology, Inc. Linux-USB user-mode bulk source/sink.

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID 0525:a4a4 Netchip Technology, Inc. Linux-USB user-mode bulk source/sink

You can filter directly with lsusb -d 0525:a4a4, or get the full descriptor dump with lsusb -v -d 0525:a4a4. Kernel messages from dmesg show the same pair as idVendor=0525, idProduct=a4a4.

Windows

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

USB\VID_0525&PID_A4A4
USB\VID_0525&PID_A4A4&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0525&PID_A4A4"

macOS

$ system_profiler SPUSBDataType
    Linux-USB user-mode bulk source/sink:
      Product ID: 0xa4a4
      Vendor ID: 0x0525  (Netchip Technology, Inc.)

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:

0525  Netchip Technology, Inc.
	a4a4  Linux-USB user-mode bulk source/sink

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