The basic model comes with the holoprojector/touchscreen like a smartphone (Or maybe something that straps to your wrist for the higher end models). So you're tapping on the thing constantly, like a tablet PC.
You can also get AR Gloves (Which are thin gloves, or even just rings you wear) which works like Minority Report or Tony Stark's garage in both Iron Man movies. Hands out, manipulating things in Holo where everyone can see, or if you have an Image Link of some type (Either through glasses/contact lenses or cybernetics) where you're the only one that can see it.
Microphones of various types (Like current bluetooth headsets) are available and might even come standard so you don't have to hold your CommLink to your mouth, but optional sub-vocal microphones let you have coversations without speaking out loud (Handy when you don't want people to overhear what you're saying, or read your lips.).
With 'Trodes, a Datajack, or Implanted, you have a DNI (Direct Neural Interface) connection and your thoughts control the device itself, no need to move or talk. The speed advantage is probably negligible, but the utility of it is quite excellent. Also, if someone's trying to steal your CommLink when it's installed in your skull, you've got bigger issues to worry about than the paydata inside of it.
Also, with all of those items, you can access VR mode (Provided you bought the optional Sim Module), whereas you're only able to do Augmented Reality without those.
Hope that helps.
EDIT: Ninja'd partly.
