Description: Violin Fiddle Silent EQ Pickup System with Piezo Set for Electric Violin Parts With volume and tone control knobs With 3.5mm line out, MIC and phone jacks Powered by a 9V battery.(not included) Material: Plastic Size Chart: Approx. 8.7x5.4x2cm/3.43x2.13x0.79inch Package Includes: 1x Pickup System 1x Headphone Cable Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size