04a5:4045 — BenQ-Siemens E81
Acer Peripherals Inc. (now BenQ Corp.)
- Vendor ID
- 04a5
- Product ID
- 4045
- Combined
- 04a5:4045
- Decimal
- 1189:16453
What is this device?
This is the USB identifier for a BenQ-Siemens E81 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 4045 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 04a5:4045 Acer Peripherals Inc. (now BenQ Corp.) BenQ-Siemens E81.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 04a5:4045 Acer Peripherals Inc. (now BenQ Corp.) BenQ-Siemens E81
You can filter directly with lsusb -d 04a5:4045, or get the full descriptor dump with lsusb -v -d 04a5:4045. Kernel messages from dmesg show the same pair as idVendor=04a5, idProduct=4045.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_04A5&PID_4045 USB\VID_04A5&PID_4045&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04A5&PID_4045"
macOS
$ system_profiler SPUSBDataType
BenQ-Siemens E81:
Product ID: 0x4045
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.) 4045 BenQ-Siemens E81