Audio set Siedle Compact in 1n technology with the functions of calling, speaking, and door opening. The IQ intercom is designed for mobile expansion via the Siedle app. Number of call buttons: 1. Each Compact set can be supplemented with an additional indoor station or a secondary signaling device for each call button. The accessory ZERT 811 is required for floor calling. Delivery includes: Audio door station Siedle Compact CA 812-1, intercom for 1n technology with WLAN interface, transformer TR 603, power supply PSM 12 24 SETIQ CA 812-1 EW.