05ac:ffff — Bluetooth in DFU mode - Driver

This is the USB identifier for a Bluetooth in DFU mode - Driver manufactured by Apple, Inc.. The vendor ID 05ac is registered to Apple, Inc. with the USB Implementers Forum, and ffff is the product ID that Apple, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 05ac:ffff Apple, Inc. Bluetooth in DFU mode - Driver.

Linux

$ lsusb
Bus 001 Device 004: ID 05ac:ffff Apple, Inc. Bluetooth in DFU mode - Driver

You can filter directly with lsusb -d 05ac:ffff, or get the full descriptor dump with lsusb -v -d 05ac:ffff. Kernel messages from dmesg show the same pair as idVendor=05ac, idProduct=ffff.

Windows

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

USB\VID_05AC&PID_FFFF
USB\VID_05AC&PID_FFFF&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_05AC&PID_FFFF"

macOS

$ system_profiler SPUSBDataType
    Bluetooth in DFU mode - Driver:
      Product ID: 0xffff
      Vendor ID: 0x05ac  (Apple, 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. Apple, Inc. official support →

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

05ac  Apple, Inc.
	ffff  Bluetooth in DFU mode - Driver

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