install = connect or perhaps pair
reveiver = hearing aid
Roger ON = wireless external microphone thingy
Installing gets the code that allows you to pair with any given Roger.
You then pair as a separate step.
Receivers can be built in or plug in external. As an example, if you get an oticon aid, you may be able to use an external receiver to use a Roger. Before the built in receivers, all the aids used this to access Roger. Before the “in” versions of the Rogers came out, you’d have to buy these external (“X”) receivers as well, then use a device that removed the code and installed it into aids with integrated receivers.
Roger on is one version of the Roger line of microphones. There seem to be a half dozen. A pen shaped one, on, select, table, maybe one or two others I’m forgetting.
WH