ITEM NAME:Acoustic Guitar Passive Tone And Volume Control Eq Equalizer Preamp Amplifi F3M8 Acoustic Guitar Passive Tone And Volume Control Eq Equalizer Preamp Amplifi F3M8 This equalizer helps to do passive tone and volume control of your guitar.You can spend less time tweaking controls and more time playing.No need of battery. 1 pick to amplify the sound. 1 small sticky plate helps to fix the power leads. 2 mounting screws connect the guitar firmly. The wire plug is 6.35mm. Features: Passive Frequency response: 20Hz-20KHz Volume: A500KΩ Tone: B500KΩ Pick-up: Piezo ceramic pick-up Item size: 6 * 3.5 * 3.5cm / 2.4 * 1.4 * 1.4inch Colour: Black Material: metal + plastic Package contents: 1* pickup 1* pickup stick 1* mounting accessories