Instead of going through the power lines, some systems use radio waves to communicate, which is also how WiFi and cell phone signals operate.

除了通过电线来实现这项技术，一些系统也会采用无线电波来进行交流，也就是我们常用的WiFi和无线手机信号。

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Instead of going through the power lines, some systems use radio waves to communicate, which is also how WiFi and cell phone signals operate.

除了通过电线来实现这项技术，一些系统也会采用无线电波来进行交流，也就是我们常用的WiFi和无线手机信号。

youdao