The iRig is a super compact interface for connecting your guitar, bass or keys, to your iOS device. The free AmpliTube iOS software gives you a world of amps, microphones, pedals and more to choose from, as well as a four track recorder. iRig also works with line level signals from synthesizers, keyboards, and mixers. To use the iRig, you simply plug the 3.5mm TRRS end into the headphone jack of your iOS device. Then plug your guitar into the 1/4” jack using a standard guitar cable. To monitor your sound, plug your headphones/line out into the 3.5 mm headphone jack on the iRig. Further iRig options include HD, with superior digital audio quality. The latest model is the iRig PRO, a full-featured compact audio and MIDI interface you can use with XLR microphones, guitar, bass, keyboard or other line-level source, and MIDI controllers.