Features: Brand new and high quality First connect the ground wire to the product, one end is connected to the screw at the end of the product, and the otherWell terminated grounded metal (water pipes, fire pipes). Connect the product and Arcs extinguishing controller with an optical fiber cable, turn off Arcs extinguishing after adjusting pulse width to the lowest and turn on Arcs extinguishing control. Connect 24v and 220v power to main body of the product respectively. Confirm that the discharge needle is installed correctly before it can be used. Crafted from sturdy metal, this versatile music gadget offer exceptional durability and reliable performances, ensuring hours of uninterrupted entertainment. Specifications: Material:Metal Size:Approx.120x180x400mm/4.72x7.08x15.74inch Package Includes: 1x Music Coil note: 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.