This Byron wired door chime is a set of bell and button offering an easy and clear solution that alerts when someone is visiting you. With a built in transformer, it is very convenient and simple to install. SOUND: With its traditional 85dB ding-dong melody, this Byron DBW-23081 indoor chime will allow you to hear all your visitors and receive them as it should. Chime Only: It is compatible with the same Byron range doorbell buttons (except backlit buttons). This wind chime can be used wired or wireless. Built-in transformer: thanks to the integrated transformer, your chime is ready to install. Wired: This wind chime requires two-wire installation. EASY INSTALLATION - It can be installed on your existing installation or used to create a new doorbell system. Weight: 1.212542441 pounds, Manufacturer: Byron