Highlights: SIP indoor unit (Android 9.0 version) with ultra-clear, elegant, and sleek design. 10-inch capacitive touchscreen with energy-saving mode. Receives HD images from the door intercom. Bidirectional communication based on SIP v2.0 protocol. Power supply via PoE or external source. Supports installation in American or European electrical wall boxes. Tamper-proof design. Table stand (optional). Premium touchscreen for your home. The multifunctional communicator Akuvox C319S with the Android 9.0 operating system offers audio and video communication with door intercoms via the SIP 2.0 protocol. It provides the ultimate touchscreen experience in a discreet, space-saving design with a brilliant 10-inch capacitive touchscreen display. Akuvox Smart Plus allows tenants to see and speak with visitors, open doors, monitor building entrances, and issue virtual keys from their smartphones. This simplifies building access management for property managers and owners. State-of-the-art smart door phones, an easy-to-use mobile intercom app, and a powerful cloud-based management portal have been developed to provide an unparalleled building experience.