Retlux RDB 102 doorbell: Don't miss any visit with the Retlux RDB 102 wireless doorbell. The doorbell includes a pair of supplied wireless buttons that offer IP44 protection and are waterproof, so you don't have to worry about bad weather damaging them. You can place the buttons from the outside in an open space up to a distance of 150 m, which allows trouble-free installation virtually anywhere. The doorbell (receiver) is powered by 230 V from the mains and the doorbell buttons themselves work completely wirelessly and do not require any maintenance, they even do without any battery. You will also enjoy the light signaling when ringing and the possibility to choose from up to 51 different melodies, which your Retlux RDB 102 bell can sound. If you would like to use more than two buttons, the good news is that you can pair up to 10 buttons with one bell.