Valcom V-2901A Single Door Answering Device with Door Unlock

Valcom V-2901A Single Door Answering Device with Door Unlock The Valcom V-2901A Single Door Answering Device with Door Unlock provides voice paging with handsfree reply to a door from any telephone location. The V-2901A initiates ring-in on the telephone systems and sends a confirmation tone to the door speaker. Features Door Unlock Contact Closure (Strikeplate Required) Alarm Functions Transmit And Receive Volume Controls Background Music Input With Volume Control Built-In Ring Generator With On/Off Switch 3 Distinctive Ring Patterns Includes Atlas 1-Year Warranty with Extended Warranty options available!