1a81:2204 — Optical Mouse
Holtek Semiconductor, Inc.
- Vendor ID
- 1a81
- Product ID
- 2204
- Combined
- 1a81:2204
- Decimal
- 6785:8708
What is this device?
This is the USB identifier for a Optical Mouse manufactured by Holtek Semiconductor, Inc.. The vendor ID 1a81 is registered to Holtek Semiconductor, Inc. with the USB Implementers Forum, and 2204 is the product ID that Holtek Semiconductor, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 1a81:2204 Holtek Semiconductor, Inc. Optical Mouse.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 1a81:2204 Holtek Semiconductor, Inc. Optical Mouse
You can filter directly with lsusb -d 1a81:2204, or get the full descriptor dump with lsusb -v -d 1a81:2204. Kernel messages from dmesg show the same pair as idVendor=1a81, idProduct=2204.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_1A81&PID_2204 USB\VID_1A81&PID_2204&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_1A81&PID_2204"
macOS
$ system_profiler SPUSBDataType
Optical Mouse:
Product ID: 0x2204
Vendor ID: 0x1a81 (Holtek Semiconductor, Inc.)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:
1a81 Holtek Semiconductor, Inc. 2204 Optical Mouse