Active tone control system, no noise, perfect for a electric violin.High quality silent EQ pick-up produces nice and charming sound.DIY your electric violin through the electric violin pickup outfit.With tone control & volume control, easy to adjust.With 6.35mm output and 3.5mm headphone jack, convenient to connect.Color: BlackMaterial: Plastic + metalTone Control: 12dBVolume Control: 0-10Frequency Response: 20Hz~20KHz Supply: 1 * 9V battery(not included)Item Weight: 62.3g/2.2ozPackage Size: 13 * 13 * 4cm/5 * 5 * 1.6inPackage Weight: 65.2g/2.3ozNote:This item is not including the battery.Package List:1 Set Violin EQ Pickup (Not including battery)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.