1a81:1701 — Wireless dongle

This is the USB identifier for a Wireless dongle manufactured by Holtek Semiconductor, Inc.. The vendor ID 1a81 is registered to Holtek Semiconductor, Inc. with the USB Implementers Forum, and 1701 is the product ID that Holtek Semiconductor, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 1a81:1701 Holtek Semiconductor, Inc. Wireless dongle.

Linux

$ lsusb
Bus 001 Device 004: ID 1a81:1701 Holtek Semiconductor, Inc. Wireless dongle

You can filter directly with lsusb -d 1a81:1701, or get the full descriptor dump with lsusb -v -d 1a81:1701. Kernel messages from dmesg show the same pair as idVendor=1a81, idProduct=1701.

Windows

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

USB\VID_1A81&PID_1701
USB\VID_1A81&PID_1701&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_1A81&PID_1701"

macOS

$ system_profiler SPUSBDataType
    Wireless dongle:
      Product ID: 0x1701
      Vendor ID: 0x1a81  (Holtek Semiconductor, Inc.)

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:

1a81  Holtek Semiconductor, Inc.
	1701  Wireless dongle

• 1a81:1004 Wireless Dongle 2.4 GHZ HT82D40REW
• 1a81:2004 Keyboard
• 1a81:2203 Laser Gaming mouse
• 1a81:2204 Optical Mouse
• 1a81:2205 Laser Mouse

See all 7 devices from Holtek Semiconductor, Inc. →