04a5:20c0 — Prisa 1240UT

This is the USB identifier for a Prisa 1240UT manufactured by Acer Peripherals Inc. (now BenQ Corp.). The vendor ID 04a5 is registered to Acer Peripherals Inc. (now BenQ Corp.) with the USB Implementers Forum, and 20c0 is the product ID that Acer Peripherals Inc. (now BenQ Corp.) assigned to this particular model. When you run lsusb on Linux, this device appears as 04a5:20c0 Acer Peripherals Inc. (now BenQ Corp.) Prisa 1240UT.

Linux

$ lsusb
Bus 001 Device 004: ID 04a5:20c0 Acer Peripherals Inc. (now BenQ Corp.) Prisa 1240UT

You can filter directly with lsusb -d 04a5:20c0, or get the full descriptor dump with lsusb -v -d 04a5:20c0. Kernel messages from dmesg show the same pair as idVendor=04a5, idProduct=20c0.

Windows

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

USB\VID_04A5&PID_20C0
USB\VID_04A5&PID_20C0&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04A5&PID_20C0"

macOS

$ system_profiler SPUSBDataType
    Prisa 1240UT:
      Product ID: 0x20c0
      Vendor ID: 0x04a5  (Acer Peripherals Inc. (now BenQ Corp.))

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:

04a5  Acer Peripherals Inc. (now BenQ Corp.)
	20c0  Prisa 1240UT

• 04a5:209e ScanPrisa 640BT
• 04a5:20ae S2W 3000U
• 04a5:20b0 S2W 3300U/4300U
• 04a5:20be Prisa 640BT
• 04a5:20de S2W 4300U+
• 04a5:20f8 Benq 5000
• 04a5:20fc Benq 5000
• 04a5:20fe SW2 5300U

See all 62 devices from Acer Peripherals Inc. (now BenQ Corp.) →