Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information;2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Pickup suitable for acoustic guitar; easy to assemble4.4 bands and volume control5.Presence control: +/8 KHz -12 dB;Bass control: +/-12dB at 600Hz;Mid control: +/-12dB at 600Hz;Three controls: +/-12 dB at 2.2 KHz;6.Input impedance: 10 mΩFrequency response: 20 hz - 20 KHz;Strength:9v7.The package includes 1x pickup rod, 4x screws, 2x nuts, 1x washer, and 1x binding wireSpecifications:Material: Metal & WireColor: Black & Silver & Yellow & BrownBrand name: BQLZRSize: 105x46x64mm/4.13 inchx1.81 inchx2.52 inch (LxWxH)Wire Length: 52mm/2.05 inchPRES Control: ±12dB at 8KHzBass Control: ±12dB at 600HzMiddle Control: ±12dB at 600HzTreble Control: ±12dB at 2.2KHzInput Impedance: 10MΩFrequency Response: 20Hz-20KHzPower: 9VWeight: 162 gPackage include:1 x 4-Band Guitar Equalizer1 x Pickup Stick4 x Screws1 x Nut1 x Gasket1 x Tie Wire