Feature: 1. Premium Speaker: This counter intercom system is equipped with premium speaker and sensitive mic, specially designed for dual way intercommunication. 2. Simple Operation: Just connect the power adapter and external speakers to the main station. The microphone cable is flexible. The system has two knobs to adjust the internal and external volume. 3. Two Way Intercom: This window speaker system adopts premium circuit device design that ensures 3W high power output, providing clear and loud voice. 4. Fully Automatic: This counter intercom speaker adopts fully automatic call control and voice intercom communication technology, which ensures automatic recognition and processing of voice signals, the call process does not require any operation. 5. Wide Application: This window intercom system is suitable for bank window, ticket office, hospital window, post office window, securities window, securities companies, hospitals, stations and other places where safety glass is installed. Specification: Item Type: Window Intercom System Material: ABS Color: Silver Output: DC 12V 1000mA Peak Output: 2x3W (Maximum) Frequency Response: 100Hz to 12KHz Scope of Application: Applicable to Bank Window, Ticket Office, Hospital Window, Post Office Window, Securities Window, Securities Companies, Hospitals, Stations and Other Places Where Safety Glass is Installed. Package List: 1 x Host Machine1 x Auxiliary Machine1 x Power Adapter1 x Adhesive2 x Cable Buckle1 x User Manual