Single-family house kit Quadra with mini handset-bound including induction loop, SB2 video kit. This kit is delivered completely pre-addressed to address 1 and only needs to be installed and electrically connected. It is also possible to split or quarter the bell button using a DIP switch code and convert this kit into a two-family house or four-family house kit by adding additional indoor stations, audio or video. A maximum of 4 indoor audio or video stations can be installed per participant. The intercom is equipped with a ring line for hearing aid wearers, which transmits the audio directly to a suitable hearing aid and makes it easier for the resident to communicate with the visitor at the door. During operation, this ring line emits an alternating magnetic field, which generates an electrical voltage in the receiving coil of the hearing aid through electromagnetic induction, the course of which is the same as that of the audio signal. In the hearing aid, this is amplified by the audio amplifier and passed to the wearer's ear via the earpiece. In order to use such induction loop systems, the hearing aid must have a so-called telephone coil (T-coil for short), which absorbs the alternating magnetic field of the induction loop. The hearing aid microphone is usually deactivated when the telephone coil is used. This kit consists of: 1x Quadra door station Art. 4893M for surface mounting, 1x power supply Art. 1209, 1x mini handset-connected indoor station Art. 6701W/BM, branch terminal Art. 1214/2C and terminating resistor Art. 1216. With the optional accessory 4792E, the horizontal inclination of the Quadra door station can be changed by 25°.