How to install the hotel special switch panel?

The installation method depends on what kind of switch, single-open and double-open. Generally, it is not necessary to pull out the key and tighten it before installation, but the 4-open switch must be pulled out and tightened before installation, because there is not enough space, and the 3-open switch depends on what brand. Some people need it, and some people don't. But no matter how you pretend, it's okay. As long as it is installed, there will be something at home. 95% of the time, there is something wrong with the quality of the switch you bought, that is, the plastic on the switch is of poor quality and broken.