Excellent little product, plugs into the usb port of the ac adapter that came with the HD Fury Linker if you got it and then you plug the Linker into the dongle here, like a booster. It allows you to connect to the Linker through Bluetooth and their handy app. Essentially, allowing you to view and change settings on the fly without needing a computer to do the same thing. Great for making sure your settings are set to the best option and what not and seeing what display modes are being pushed and pulled. Haven't had any issues, works great. Recommended extension to the product line.
Used it with HD fury linker to connect to Android Oneplus phone app and works really well. The Dongle is in a separate room next to HT room and signal travels through wall no problem. Very convenient to see details of signal going through linker and control the Linker via phone App.