Handset-free audio intercom system in 2-wire technology for single-family homes. It features a free intercom as well as two physical call buttons (to accept or end a call). There are three sensor buttons for opening the door, turning on the stair light (activator required), and switching the door station on or off. Additionally, it includes four freely configurable extra buttons (e.g., internal voice transmission, additional door opener, etc.) and 16 melodic ringtones that can be set for door and floor calls with call differentiation. The ringtone volume is adjusted via the side control. It also has a doctor switch/door call function and an LED display for turning off the ringtone, the door opener, and the connection status. Installation is done with the included wall mount. A table accessory is available separately. Connections for BUS, floor call, and additional bell are provided. The door station already has one to two call buttons, allowing for a quick and easy setup of a two-family house system by adding another house station. The package includes the wall-mounted door station with one to two call buttons and LED-lit nameplates. The door station can also be flush-mounted with a flush-mounted box and accessories. The protection class is IP 54, with impact resistance IK 10. A power supply and a door opener relay with a potential-free contact are included.