A:AnswerYou need the port on the Mini for power. Yes it will connect to your tablet if you enable the Bluetooth pairing on the speaker and add it on your tablet or you can stream sound via casting from Chrome browser on the tablet.
A:AnswerYes, either during setup or in the settings, connect it to several music streaming services including Spotify, Google, YouTube music and Amazon. You can also connect to the Mini via Bluetooth and stream any other audio that you would like.
A:AnswerAll of the units can act as complete individual units separate from others or you can combine them together. In the Google home app, you can even create groups, I have a couple label Master Suite which covers my master bedroom and bathroom, living area which covers my kitchen is sitting room area and one called whole house which plays them all. They are actually quite versatile and easy to use and you can even transfer music from one location to another if you choose.
A:Answer2nd Gen has slightly better sound, has a round power plug that plugs into the mini (replaces the standard USB mini plug on gen1), And overall, the 2nd gen looks more professionally built. I honestly like gen1 looks and usb plug better.. but the sound makes gen2 a better choice for most people.