ITEM NAME:Electric Pickup Bridge Preamp Set for Violin K8R1 Electric Pickup Bridge Preamp Set for Violin K8R1 This set includeds tone knob, volume knob, pickup bar with 2.5mm plug, 4/4 bausch bridge, pickup with transducer and 6.35mm jack. Please note that the transducer must sit on a flat surface so this can not be used on a traditional violin - should be used on solid body or other design that has a flat spot under the bridge. Use this set to amplify your instrument's sound. Pickup Bar Size: Approx. 41.2 x 5.5 x 2mm Bridge Standard: 4/4 bausch bridge Audio Plug: 2.5mm Endpin Jack: 1/4 inch / 6.35mm Color: As Shown Material: Metal + Plastic Package Includes: 1 * Violin pickup Kits Set Only the above package content, other products are not included. Note: Light shooting 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.