0a12:ffff — USB Bluetooth Device in DFU State
Cambridge Silicon Radio, Ltd
- Vendor ID
- 0a12
- Product ID
- ffff
- Combined
- 0a12:ffff
- Decimal
- 2578:65535
What is this device?
This is the USB identifier for a USB Bluetooth Device in DFU State manufactured by Cambridge Silicon Radio, Ltd. The vendor ID 0a12 is registered to Cambridge Silicon Radio, Ltd with the USB Implementers Forum, and ffff is the product ID that Cambridge Silicon Radio, Ltd assigned to this particular model. When you run lsusb on Linux, this device appears as 0a12:ffff Cambridge Silicon Radio, Ltd USB Bluetooth Device in DFU State.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 0a12:ffff Cambridge Silicon Radio, Ltd USB Bluetooth Device in DFU State
You can filter directly with lsusb -d 0a12:ffff, or get the full descriptor dump with lsusb -v -d 0a12:ffff. Kernel messages from dmesg show the same pair as idVendor=0a12, idProduct=ffff.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_0A12&PID_FFFF USB\VID_0A12&PID_FFFF&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0A12&PID_FFFF"
macOS
$ system_profiler SPUSBDataType
USB Bluetooth Device in DFU State:
Product ID: 0xffff
Vendor ID: 0x0a12 (Cambridge Silicon Radio, Ltd)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:
0a12 Cambridge Silicon Radio, Ltd ffff USB Bluetooth Device in DFU State