Features:OOTDTY   Active Endpin Jack Preamp Piezo Pickup Kit for Acoustic Classical Guitar Volume ControlWith 1 Volume controlEasy to install, no need for cutting a big hole on the edge of it6.35mm output jack connect speaker and amplifierMaterial: metalSpecifications: Material: MetalWeight: 55gSize: 10.3x1.55x1.55cm/4.05x0.61x0.61inchPackage Includes: 1x Guitar Pickup KitNote: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.