04a5:2040 — Prisa 620UT
Acer Peripherals Inc. (now BenQ Corp.)
- Vendor ID
- 04a5
- Product ID
- 2040
- Combined
- 04a5:2040
- Decimal
- 1189:8256
What is this device?
This is the USB identifier for a Prisa 620UT 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 2040 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 04a5:2040 Acer Peripherals Inc. (now BenQ Corp.) Prisa 620UT.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 04a5:2040 Acer Peripherals Inc. (now BenQ Corp.) Prisa 620UT
You can filter directly with lsusb -d 04a5:2040, or get the full descriptor dump with lsusb -v -d 04a5:2040. Kernel messages from dmesg show the same pair as idVendor=04a5, idProduct=2040.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_04A5&PID_2040 USB\VID_04A5&PID_2040&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04A5&PID_2040"
macOS
$ system_profiler SPUSBDataType
Prisa 620UT:
Product ID: 0x2040
Vendor ID: 0x04a5 (Acer Peripherals Inc. (now BenQ Corp.))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:
04a5 Acer Peripherals Inc. (now BenQ Corp.) 2040 Prisa 620UT