Ps800 is a standard, fast and strong through system strengthening device, which can start all kinds of equipment one by one according to the order of the system from the front to the back; when the system is shut down, the system equipment will be shut down from the back to the front. In this way, the connected electric equipment can be controlled effectively, and the human error operation can be avoided. The terminal equipment (such as power amplifier, horn, etc.) may be damaged due to this kind of error. At the same time, the impact current of the on / off electric equipment on the transmission line can be reduced. Its superior performance will make the system operation no longer tedious.