072f:b101 — ACR39K
Advanced Card Systems, Ltd
- Vendor ID
- 072f
- Product ID
- b101
- Combined
- 072f:b101
- Decimal
- 1839:45313
What is this device?
This is the USB identifier for a ACR39K manufactured by Advanced Card Systems, Ltd. The vendor ID 072f is registered to Advanced Card Systems, Ltd with the USB Implementers Forum, and b101 is the product ID that Advanced Card Systems, Ltd assigned to this particular model. When you run lsusb on Linux, this device appears as 072f:b101 Advanced Card Systems, Ltd ACR39K.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 072f:b101 Advanced Card Systems, Ltd ACR39K
You can filter directly with lsusb -d 072f:b101, or get the full descriptor dump with lsusb -v -d 072f:b101. Kernel messages from dmesg show the same pair as idVendor=072f, idProduct=b101.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_072F&PID_B101 USB\VID_072F&PID_B101&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_072F&PID_B101"
macOS
$ system_profiler SPUSBDataType
ACR39K:
Product ID: 0xb101
Vendor ID: 0x072f (Advanced Card Systems, Ltd)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:
072f Advanced Card Systems, Ltd b101 ACR39K