"2 Band Active Bass Guitar EQ Equalizer Preamp Circuit Pickup Black\r\nDescription:\r\nbrand new and high quality\r\nBass guitar tone controls for active pickups\r\nBass/treble,master volume \r\nBass:12dB at 85Hz \r\nTreble:12dB at 7KHz \r\nOutput jack \r\nKindly reminding:the wiring diagram is not included,many customers have difficulty \r\nin installing the Circuit,please double check if you could install it before you buy\r\nMaterial:Plastic\r\nColor:Black\r\nQuantity: 1 pc\r\nNote:\r\nTransition: 1cm=10mm=0.39inch\r\nNo retail package.\r\nPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.\r\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage includes:\r\n1 x 2 band pickup preamp circuit(Battery and other accessories demo in the picture is not included.)":