S with signal output port: by electronic control in the mainboard to often open and closed, public three port fuses can external electromagnetic valve or booster pump.
带有信号输出端口:由电子控制主板里的常开、常闭、公共三个端口引线可外接电磁阀或增压泵。
2
The benefit for signalbooster can save lots of wiring costs and easy to build wireless infrastructure for home or business use.