100% Brand new,never used Item"s color might be different from the picture because of the aberration. Active Preamp 3 Band Equalizer EQ Harness Guitar Bass Tone Control System-III five individual potentiometers Four of them:Middle,Treble,Volume & Bass Bass guitar tone controls for active pickups Bass/midrange/treble,master volume Input Impedance:20Mω Frequency Response:20Hz~20KHz Bass:±12dB at 85Hz Middle:±12dB at 800Hz Treble:±12dB at 7KHz Output jack Power 9V battery not included Applications:Electric guitar,bass and piezo equipped instruments wiring diagram is included Package Includes: 1 set of 3 band bass pickup preamp circuit