Product Information: iRig Acoustic Stage is the new hi-tech solution for accurately reproducing the full sound of acoustic guitars and other instruments with studio-quality sound live on stage and in the studio. The combination of its advanced MEMS microphone and hi-quality preamp and DSP processing unit provides for the first time ever a break-through solution that offers hi-quality natural sound, advanced features, ease of installation and a convenience never seen before. Product Features: Warranty period: Limited 1 Year Warranty Advanced MEMS microphone clips on to sound hole Preamp/DSP unit Dramatically improves your live acoustic sound 1/4" AUX input with volume for piezo, magnetic pickups or other onboard electronics 1/4" Output with level control for amplifier or PA system USB audio out for recording on a computer or mobile device Cancel Feedback with multiple frequency feedback cancelling 6 tone presets Personal instrument calibration Phase switch for optimizing dual source sound For more information and specifications, please refer to the manufacturers website