Expand the Alecto SMART-RING20 with the extra doorbell SMART-RING-BELL. This is an extension of the existing SMART Wifi doorbell with camera.With this extension you can extend the range of the doorbell. These two doorbells are wirelessly connected to each other. When someone is at the door you will receive a notification via the free Smart Life app. In addition to this notification, you also hear the doorbell ringing at home. With the Alecto SMART-RING-BELL you can choose between four different melodies as ringtone. You can set the volume yourself.Are you not yet the owner of the Alecto SMART-RING20 but would you like to read more information about it? Then you can view this Alecto SMART Wifi doorbell here.