0525:a4aa — Linux-USB CDC Composite Gadge (Ethernet and ACM)
Netchip Technology, Inc.
- Vendor ID
- 0525
- Product ID
- a4aa
- Combined
- 0525:a4aa
- Decimal
- 1317:42154
What is this device?
This is the USB identifier for a Linux-USB CDC Composite Gadge (Ethernet and ACM) manufactured by Netchip Technology, Inc.. The vendor ID 0525 is registered to Netchip Technology, Inc. with the USB Implementers Forum, and a4aa is the product ID that Netchip Technology, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 0525:a4aa Netchip Technology, Inc. Linux-USB CDC Composite Gadge (Ethernet and ACM).
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 0525:a4aa Netchip Technology, Inc. Linux-USB CDC Composite Gadge (Ethernet and ACM)
You can filter directly with lsusb -d 0525:a4aa, or get the full descriptor dump with lsusb -v -d 0525:a4aa. Kernel messages from dmesg show the same pair as idVendor=0525, idProduct=a4aa.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_0525&PID_A4AA USB\VID_0525&PID_A4AA&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0525&PID_A4AA"
macOS
$ system_profiler SPUSBDataType
Linux-USB CDC Composite Gadge (Ethernet and ACM):
Product ID: 0xa4aa
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. a4aa Linux-USB CDC Composite Gadge (Ethernet and ACM)