The Fysic FD-110 is a doorbell that is well suited for seniors and hearing-impaired people. The doorbell consists of a door press and indoor unit. The installation is simple (plug & play) and the receiver is equipped with light flashes so that you not only hear that someone is at the door, but also sees it. In addition, the volume is adjustable and the receiver has 36 melodies. The range between the door printer and receiver is 30 meters on average. Place the receiver in a logical location where the flashes of light are clearly visible. For example, a visitor at the door never waits too long.