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In recent decades, wireless doorbell systems that do not require wall wiring have become popular. The doorbell button contains a built-in radio transmitter powered by a battery. When the button is pushed, the transmitter sends a radio signal to the receiver unit, which is plugged into a wall outlet inside the building.
layers of its construction, the HomeRF standard produces products which are more robust against interference than any other wireless LAN standard for the 2.4 GHz band. How wireless LANs Work Wireless LANs use electromagnetic waves to communicate information from one point to another without relying on any physical connection. Radio waves are often referred to as radio