You're probably wondering why you should consult an electrician. The answer is simple. Although the installation is very simple, the assessment and compatibility issues are too difficult for most people. So it is really easy for the electrician to check that the transformer can also drive a doorbell, or the old bell should be reconnected or whether perhaps the bell wire must be extended. All these topics can lead to a faulty installation for a non-specialist, which then leaves the customer with a broken bell or doorbell.