Active tone control system, no noise, perfect for a electric violin. High quality silent EQ pick-up produces and charming sound. DIY your electric violin through the electric violin pickup . With tone control and volume control, easy to adjust. With 6.35mm output and 3.5mm headphone , convenient to connect. Color: Black Material: Plastic and metal Tone Control: 12dB Volume Control: 0-10 Frequency Response: 20Hz-20KHz Power Supply: 1 x 9V battery(not included) Item Weight: 62.3g/2.2oz Package Size: 13 x 13 x 4cm/5 x 5 x 1.6in Package Weight: 65.2g/2.3oz Note: 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin