https://www.doorbird.com/downloads/datasheet/datasheet_a1101_en.pdf?2
Doorbird Intercom IP Video Indoor Station A1101 White Edition
$607.50
For door communication in single-family residences and apartment buildings
Polycarbonate, white (GTIN/EAN: 4260423860902, P/n: 423860902)
WiFi / LAN connection (PoE capable)
4“ True Color Touch Display
2-way HD Audio, up to 102 dB
Room to room communication
SIP support
Home and building automation control
3 freely configurable bistable switching relays