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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.
How do you install wired door chimes? The primary advantage of wireless doorbells is they do not require installing wires between the button at the door, the transformer and the chimes. Transmitters often use batteries, while the sound device either plugs into household current or uses batteries.