A:AnswerYes. It connects via bluetooth. I connected it to the Amazon dot and it works fine. The speaker does need to be on and in bluetooth mode. I haven't figured out how to have Alexa turn on the speaker and the bluetooth.
A:AnswerWith the Soundbar powered off, on the end of the soundbar itself hold the play and pause buttons until INIT is displayed, release buttons, the soundbar is now reset.
A:AnswerYes, these systems use Blu-tooth to connect to one another. I've notice in some cases that latency issues on older models since processors are a bit slower. It can be done, some units use WiFi as well which I've never heard of latency issues there.