Qezodsx Guitar Pickups Prefix Plus T Onboard Preamp Matrix Acoustic Pickup EQ Equalizer with Tuner Soft Piezo

【4-Band Precision EQ Control】This guitar pickup features separate Bass, Treble, Contour (±12dB), and Brillance (±9dB) sliders—a versatile guitar EQ equalizer preamp for tone shaping. 【Feedback-Fighting Notch Filter】Includes a built-in notch filter and phase switch to eliminate unwanted feedback, making this acoustic guitar pickup ideal for live performances. 【Built-In Tuner with LED Display】Integrated tuning function with clear LED display shows tuning information—no need for external tuners with this EQ preamp pickup. 【Contour Frequency Sweep】Adjustable 250Hz-3kHz contour frequency allows precise mid-range control, perfect for plus-t pickups enthusiasts seeking customized sound. 【Compact & Battery Powered】Measures just 11x6.5cm and runs on a standard 9V battery (not included)—a portable acoustic guitar pickup solution for any guitarist.