Bought this as an add-on for my 7300 but it is such a sensitive wee item it fares really well as a stand alone receiver ... using my end-fed multiband (UKantennas) this is an amazingly cheap way to scan the bands !....just buy one ...John MM1ANP
Initially bought as a pan adapter for my FTDX3000, it rapidly became much more than that. A very sensitive and versatile little receiver, at a truly amazing price. I initially intended to install on my iMac running OS10.13 (high Sierra), but it’s not yet supported as at January 2020. If you’ve earlier versions of OS10 it should be OK. It installed and ran easily on a Windows 10 laptop of some age, so no problems. Very highly recommended.