Features: The metal plate shells provides additional protections, making the circuit more Enduring and suitable for long terms use. Adopting great circuits and connectors, ensuring high sound transmission clarity and excellent sound quality reproduction. Stable signal transmission ensure that your performances is not disturb and maintains high sound quality. This guitar tone control systems is operated by a 9V battery and has a battery case to protect the battery. Suitable for all levels of guitarists, including professional performers, enthusiasts, and learners. Suitable for professional occasions such as music performances, recording studios. Specifications: Materials: Metal and Plastic Size: about 15.2x6.96x3cm/5.98x2.74x1.18inch Package Includes: 1set Guitar Control Plate note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.