A:AnswerIt’s compatible if you have a Bluetooth dongle or enabled computer. Windows XP service pack 2 is required which can be downloaded from windows update. This being said, Windows XP being one of the best operating systems they ever made is no longer supported and has security risks for those who use it still. Be careful!
A:AnswerAbsolutely. There are 3 buttons at the top left hand corner numbered to allow you to connect 3 devices. You can easily switch without disconnecting.
A:AnswerI mean it's compatible with my Galaxy 10 tablet, and my Asus Chromebook, and my LG sp320 phone, and my Galaxy j3 phone, and my Dell Inspiron. My guess is, yeah it should work with your galaxies. So long as they have Bluetooth pairing, it will probably work.