9ac4:4b8f — ProxMark-3 RFID Instrument

This is the USB identifier for a ProxMark-3 RFID Instrument manufactured by J. Westhues. The vendor ID 9ac4 is registered to J. Westhues with the USB Implementers Forum, and 4b8f is the product ID that J. Westhues assigned to this particular model. When you run lsusb on Linux, this device appears as 9ac4:4b8f J. Westhues ProxMark-3 RFID Instrument.

Linux

$ lsusb
Bus 001 Device 004: ID 9ac4:4b8f J. Westhues ProxMark-3 RFID Instrument

You can filter directly with lsusb -d 9ac4:4b8f, or get the full descriptor dump with lsusb -v -d 9ac4:4b8f. Kernel messages from dmesg show the same pair as idVendor=9ac4, idProduct=4b8f.

Windows

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

USB\VID_9AC4&PID_4B8F
USB\VID_9AC4&PID_4B8F&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_9AC4&PID_4B8F"

macOS

$ system_profiler SPUSBDataType
    ProxMark-3 RFID Instrument:
      Product ID: 0x4b8f
      Vendor ID: 0x9ac4  (J. Westhues)

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:

9ac4  J. Westhues
	4b8f  ProxMark-3 RFID Instrument

See all 1 devices from J. Westhues →