In a nutshell, the system works not over WiFi, but using the Z-wave protocol.

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At least three major wireless protocols -- INSTEON, ZigBee and Z-Wave -- vie for adoption in wall switches for lighting.

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The latest version, which we had the opportunity to play around with at CES, features a 2.8-inch display, as before, but adds some much welcomed additions, including support for 802.11ac, Zigbee and Z-Wave.

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