0403:ef10 — FT1245BL

This is the USB identifier for a FT1245BL manufactured by Future Technology Devices International, Ltd. The vendor ID 0403 is registered to Future Technology Devices International, Ltd with the USB Implementers Forum, and ef10 is the product ID that Future Technology Devices International, Ltd assigned to this particular model. When you run lsusb on Linux, this device appears as 0403:ef10 Future Technology Devices International, Ltd FT1245BL.

Linux

$ lsusb
Bus 001 Device 004: ID 0403:ef10 Future Technology Devices International, Ltd FT1245BL

You can filter directly with lsusb -d 0403:ef10, or get the full descriptor dump with lsusb -v -d 0403:ef10. Kernel messages from dmesg show the same pair as idVendor=0403, idProduct=ef10.

Windows

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

USB\VID_0403&PID_EF10
USB\VID_0403&PID_EF10&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0403&PID_EF10"

macOS

$ system_profiler SPUSBDataType
    FT1245BL:
      Product ID: 0xef10
      Vendor ID: 0x0403  (Future Technology Devices International, Ltd)

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. Future Technology Devices International, Ltd official support →

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

0403  Future Technology Devices International, Ltd
	ef10  FT1245BL

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• 0403:f0c8 SPROG Decoder Programmer
• 0403:f0c9 SPROG-DCC CAN-USB
• 0403:f0e9 Tagsys L-P101

See all 179 devices from Future Technology Devices International, Ltd →