The DA-1AS is a door phone set from Aiphone which features a silver colored finish and an included power supply. The DA-1AS door phone set comes with a door release which is wired from the door station without help from an additional transformer; it also comes with a call tone indicator and mute feature, and a service button for user control. The DA-1AS phone set also consists of an optional call extension, and features directory backlighting, a compact size, and a lightweight design for easy setup.
