Description: Active Preamp 3 Band Equalizer EQ Harness Guitar Bass Tone Control System-III five individual potentiometers Four of them: Middle,Treble,Volume & Bass Bass/midrange/treble,master volume Apply for electric guitar,bass tone volume control active pickup Come with 9V Guitar Battery Cover(Battery is not included) Specification: Input Impedance:20M? Frequency Response:20Hz~20KHz Bass: ±12dB at 85Hz Middle: ±12dB at 800Hz Treble: ±12dB at 7KHz Package Includes: 1 set of 2 band bass pickup preamp circuit Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item