Description: 1 Set 4/4 Full Size Electric Violin DIY Accessories Luthier Tools Including bridge, battery box, connection cables, nuts, washers and wiring diagram Brand new and high quality, testing is fine Material: Metal Specification: Function : 1V + 1T Active Input Impedance : 10Mω Frequency Response : 20Hz ~ 20KHz Headphones : φ 3.5 Package Includes: 1 Set Violin DIY Accessories