The Prefix Premium Blend features our acclaimed Acoustic Matrix undersaddle pickup, onboard chromatic tuner, and a gooseneck-style internal microphone. To complement this pickup, our miniature gooseneck microphone captures the guitar’s elusive natural ambience and sound chamber resonance. Blend the pickup and the microphone together for a powerful and cohesive acoustic guitar tone that is deeper and more “filled out” than the sound of either the microphone or pickup alone. The package includes a Phase switch and an adjustable Notch filter, both essential for fighting feedback.FeaturesState-of-the-art onboard preampVolume control as well as Bass, Treble, and a wide-range semi-parametric EQ to isolate certain frequencies, and boost or cut them as neededFeedback-fighting Notch filter and Phase switchOnboard chromatic tuner can be used without plugging in the guitarGooseneck-style internal microphone with a pickup/mic blending sliderLow battery indicatorUnique pivot design for instant 9-volt battery accessSystem includes an Acoustic Matrix Undersaddle Pickup and Switchjack Stereo Endpin JackPickup available in wide, narrow or split formatsProfessional installation is recommendedSpecsDimensions: 2.46"" W X 4.02"" H (62.5 mm) (102.25 mm)Wide Format: 1/8"" (3.2 mm) WidthNarrow Format: 3/32"" (2.3 mm) WidthBattery: 9-VoltBattery Life: 130 Hours.