I'm having some issues setting up my VR-N7500

I first learned the HT app on my VR-76N and it was nice to see how changes in the app changed the radio settings. I was able to get up to speed quickly on the 7500 with repeaters, APRS, etc. I am having a few other issues however:

  1. I can’t get sound to come out of the phone or tablet speakers. The PPT on the tablet seems to work and the tablet microphone seems to work, just no incoming audio. It works from the handheld wired mic just fine (excellent audio quality and volume).

  2. I can’t find any documentation on what the buttons on the wired mic do (let alone how to program them). The toggle at the top seems to only change channel. I can’t figure out the function of the other 3 buttons or how to change volume.

  3. There is a loud click at the end of transmissions even with Tail elimination enabled. Tail elimination works fine on my N76.