Glossy appearance IMR mold transfer technology. The use of the IMR mold transfer technology to the typical crystal makes the A9 flower patterns more fresh and bright. Edge distribution uses metallic plating technology. With light irradiation, the crystal reflections match the edge of the chrome-plated each other. The button is large and flexible. The panel and the internal components of Feidiao the A9 Code crystal switch used in all lock-type stitching, imported Bayer PC material. So that the product has excellent elasticity, and the surface uses paint handling, different from the general switch paint, which avoids the problem of fade after prolonged use. Lock-type stitching connection close, it is not easy to loosen and uses safer and more permanent. Switch inside the copper all used the high quality copper material stamping, unlike the general switch welding the copper material firmly. This contact made the parts more solid, convenient and durable. Contacts used sterling silver, silver is the best conductor; it guarantees the 16 A current through and further improve the safety factor.