Yes, there's a chat system and it's very important to use it! Arma is all about communication and teamwork. Even if you buy a cheap mic it will be fine. And for mouse, I don't recommend wireless. Get one with a braided cable and make sure it has lots of buttons cuz you will need them. Here's the one I have, it's cheap, well built and overall awesome! I highly recommend it.. http://www.amazon.com/Perixx-MX-2000R-Programmable-Gaming-Laser/dp/B00CEX29K0/ref=sr_1_2?s=electronics&ie=UTF8&qid=1429544558&sr=1-2&keywords=perixx+mx-2000