They do not unpair when they are on the charger making them super easy to use each time. 5 in these and they fit wonderfully. Quality is very good. Im a bit of a crazy person when it comes to my kids shoes. ), so they ARE compatible. I first connected my mp3 player to the speaker with an rca cord and the sound quality was great. You have to download an app on your iPhone (only Apple is supported) and then go through several ?games? to get it. This little gadget takes up very little room. After charging and installing, it was a day or so later that it had to be charged again and I certainly dont use it all day long. The sound quality is great and with the entertainment systems sub woofer it added the bass that had been missing for so long playing my albums on a portable turntable through bookshelf speakers.