ITEM NAME:Guitar Violin Pickup Piezo Transducer Bridge Set with Tone Volume Knob A4U8 Guitar Violin Pickup Piezo Transducer Bridge Set with Tone Volume Knob A4U8 If you are a friend who loves to play music, this pickup and preamplifier kit is a great tool to amplify the sound of your instrument, giving you more unique music enjoyment. Use this complete pickup set to make your individual electric Violin sound. Use this set to amplify your instrument's sound. colour:Photo Color Material:Plastic + metal size:6.55x2.65x3.55cm Package Contents: 1 x Pickup stick 2 x Knob 1x Violin 4 x Screws 1x 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.