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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Sagem Orga was on the floor of MWC this week, a company that really doesn't typically draw a lot of attention outside wireless industry suits who fly out to Barcelona to broker deals -- at least, not until they do something totally insane like stuff a WiFi radio into a SIM card.

ENGADGET: Sagem Orga shows off pricey SIMfi prototype at MWC Hands-on

Inside the two-toned elliptical head-piece are a pile of electronics, including Bluetooth, GPS, WiFi and a cellular radio.

ENGADGET

WiFi has been the first radio standard supported by connected thermostat startup Nest.

ENGADGET: Switched On: The roads to home automation