A:AnswerNot sure how far, but in my experience I was able to use across my living room with no signs of disconnecting or added latency. So I’m confident it could have went further, I’m sure apple lists it online too
A:AnswerIf you mean to use while it is plugged in? Than no you can not use it plugged at all because the plug is underneath mouse. It has a usb that plugs into the wall plug adapter.
A:AnswerNo cover friend! Charge it with an Apple charge cord of any kind, just needs to be lightening which has been the standard on all iPhones for many years now