Aura Acoustic Imaging Technology in a familiar effects pedal format. Acoustic musicians can easily and accurately reproduce the sound of their instrument as miked in a professional studio. Choose Your Pedal Each Aura Imaging Pedal is matched to a specific body style. We hand pick Images for each pedal from the most popular guitar and microphone combinations. This model is for use with 12-string guitars. These are typically jumbo or dreadnought size instruments. The heavier bracing for 12 string guitars creates a unique sound and has its own Aura Imaging Pedal. Easy to set up and use, Aura Acoustic Imaging Pedals eliminate intrusive stage noise and expensive microphone setups, allowing you reveal the true, unique voice of your instrument in any amplified performance. Features Six models feature 16 Images each for use with the most popular guitar bodies (Dreadnought, Concert, Orchestra, Jumbo, Nylon and 12 String) Volume, Blend, and Image Select controls Feedback-fighting Phase switch Bypass/Mute foot switch Input Trim with Clip/Low Battery indicator Designed for use with guitars featuring undersaddle or soundhole pickups Runs on 9V battery or power adapter 24 bit A/D/A; 32 bit internal processing Dimensions: 5.6"L x 4"W x 2.1"H SPecifications A/D, D/A conversion: 24 -bit Signal processing: 32 -bit Power supply: 9V alkaline battery or 9VDC adapter Typical in-use current consumption: 18mA Typical 9V alkaline battery life: 27 hours 9V adapter: Fishman 910-R (for 110V) or suitable filtered and regulated, 2 00mA type, tip = negative Input impedance: 10M Ohm Nominal output impedance: 3 .5k Ohm Input trim gain range: -10dB to +2dB Maximum output level (onset of clipping): +2.4dBV Baseline noise: -92dBV (A-weighted) Dynamic range: 94dB (A-weighted) Phase switch: Left position = non-inverting