Peace, mercy, and blessings of God be upon you. ((Desirable and in demand, the electronics are now available)) Whoever comes with it, and the feature of the damper I am offering is that it comes with a switch, which is better than a remote. When you open it, the sound comes out, and when you close it, the original sound returns.)) Available sizes: 3 inches, the best size for performance and sound, and it fits all cars. Contents: 1- Thermal insulation for wires 2- Electronic damper 3- A switch that can be installed anywhere inside the car