IK Multimedia iRig PRE for iPhone/iPod touch/iPad and Android Devices iRig PRE is the ultimate solution for connecting any type of microphone - from regular stage microphones to expensive studio models - to any iPhone iPod touch or iPad providing access to the widest range of recording applications. iRig PRE is a high-quality microphone preamp designed specifically for iOS devices that allows musicians to use their favorite 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 Onboard 9V battery provides the necessary voltage for phantom-powered studio condenser microphones for at least for 15 hours of continuous use.