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 provided proper casing and power supply is developed.

Their specifications say, "Power over Ethernet (POE)". 

The Wiki article describes how power is distributed over ethernet (LAN) wiring. 

Another source is the Power Over the Ethernet Resource site. 

Many ethernet routers are available to provide power to downstream devices. 

Actually, setting up a security camera with nothing but a LAN connection that
provides both communications connectivity and power is an elegant solution. 

--Martin