A wired doorbell is a doorbell that is connected to a power point in the house via a cable. Often, the wired doorbell uses the existing wiring of your current doorbell. That means you can connect it to the bell wire that runs to your current doorbell. This sometimes requires a transformer if the new doorbell uses a different voltage. Check carefully which wiring is required before connecting a new wired doorbell. If you find the installation complicated, choose the Coolblue installation service.