1. Simon switch socket: in 1916, Spain, a world-famous communication wiring brand, simon electric China Co., Ltd.

2. Siemens: Germany, the largest electrical and electronic company in the world, started in 1847).

3. Panasonic: China's well-known trademark, Matsushita Electric Co., Ltd.).

4. TCL- Legrand China famous trademark, TCL-Legrand International Electrician Huizhou) Co., Ltd.).

5. MerlinGerin: one of the preferred brands in the global power distribution field under schneider electric, Tianjin meilin gerin electric group).