The OpenSpot 4 is a versatile digital hotspot device. It allows you to connect your digital radio transceiver to the internet, enabling communication with other radio operators worldwide through digital voice modes / networks such as DMR, D-STAR, YSF, and others. In short, if your radio supports one of the previously listed modes, but you don't have a repeater in range that does, this will be your participation ticket.
I run a SharkRF Server, which allows any openspot user to connect directly from anywhere in the world. Any mode that the OpenSpot supports is supported on my server. It is mostly intended as a place for me and my friends to privately test things without disturbing others, but I welcome and would be happy to see any traffic. It works similar to a server from any of the supported modes in that anyone connected at the time of your transmission will be able to hear and respond. If you try to connect and can't, reach out and I'll investigate / help.
You can access the dashboard here