Item Type: Guitar Pickup EQ Material: Plastic + metal Colour: Black PRES Control: 12dB at 8KHz BASS Control: 12dB at 600Hz MIDD Control: 12dB at 600Hz TREB Control: 12dB at 2.2KHz Input Impedance: 10M Frequency Response: 20Hz-20KHz Power Supply: 9V alkaline battery (not included) Suitable for acoustic guitar. Size of Plug Cable: Approx. 2.5mm / 0.1in 1This guitar pickup EQ is pre-wired for easy assembly without other requirement 2Professional pickup EQ support BASS, MIDD, TREB, PRES 4 band plus volume control 3Equipped with battery box, can hold batteries, which guarantee a long running time 4Come with 2.5mm plug cable and low battery indicator, suitable for classic, acoustic, folk guitars 5Made of high class material with good quality, durable for a long service life1 x Guitar Pickup EQ1 x Cable1 x Suction Cup1 x Thin Belt1 x Nut1 x Gasket4 x ScrewPlease note that the type and old type of this product will be sent randomly, and make sure you will not mind before ordering.