Combines the Matrix under-saddle element with the Ellipse Blend preamp / microphone, unit mounts on the underside of the top at the soundhole, easily accessed controls include mic/pickup blend, volume and phase, signal routes to a standard 1/4" endpin jack, professional installation is recommended, fits acoustic guitars with a 3/32" saddle width. Please note that specific top bracing patterns may prevent installation. Taylor, Larrivee and Seagull are particularly problematic lines. The only way to know if this unit will fit your guitar is to physically check the fit on your guitar.