Ik multimedias irig pre is the first high quality microphone preamp designed specifically for ios devices that allows musicians to use their favourite high quality stage or studio mics with their ios device the microphone plugs directly into the standard xlr connector of irig pre with no need for extra cables or adapters its adjustable thumbwheel gain control allows the user to easily make precise level settings the on board 9 v battery provides the necessary voltage for phantom powered stud