These doorbells take their power from the mains, and are directly plugged into a socket. They receive a wireless signal from wireless bell push buttons or wired to wireless converters. They have the convenience of being positioned anywhere where there is an available socket. All the doorbells are either 50m, 100m or 150m models. Most of the models will happily work with portable or wall-mounted models within their manufactures ranges. It should be remembered that most models which have no internal switches to set the frequency (auto-detecting models) will loose there settings when unplugged from the socket, and will have to be reset. However the Byron BY range of plug-in models do retain their settings when removed from a socket.
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