1a81:1004 — Wireless Dongle 2.4 GHZ HT82D40REW
Holtek Semiconductor, Inc.
- Vendor ID
- 1a81
- Product ID
- 1004
- Combined
- 1a81:1004
- Decimal
- 6785:4100
What is this device?
This is the USB identifier for a Wireless Dongle 2.4 GHZ HT82D40REW manufactured by Holtek Semiconductor, Inc.. The vendor ID 1a81 is registered to Holtek Semiconductor, Inc. with the USB Implementers Forum, and 1004 is the product ID that Holtek Semiconductor, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 1a81:1004 Holtek Semiconductor, Inc. Wireless Dongle 2.4 GHZ HT82D40REW.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 1a81:1004 Holtek Semiconductor, Inc. Wireless Dongle 2.4 GHZ HT82D40REW
You can filter directly with lsusb -d 1a81:1004, or get the full descriptor dump with lsusb -v -d 1a81:1004. Kernel messages from dmesg show the same pair as idVendor=1a81, idProduct=1004.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_1A81&PID_1004 USB\VID_1A81&PID_1004&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_1A81&PID_1004"
macOS
$ system_profiler SPUSBDataType
Wireless Dongle 2.4 GHZ HT82D40REW:
Product ID: 0x1004
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. 1004 Wireless Dongle 2.4 GHZ HT82D40REW