Premium Speakers: This counter intercom system features premium speakers and a sensitive microphone, specifically designed for two-way communication. Easy Operation: Simply 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. Two-Way Communication: This window speaker system uses a premium circuit design that ensures 3W high power output, providing clear and loud voice transmission. Fully Automatic: This counter intercom speaker uses fully automatic call control and voice communication technology, ensuring automatic recognition and processing of voice signals; no operation is required during the call process. Wide Application: This window communication system is suitable for bank windows, ticket offices, hospital windows, post office windows, security windows, securities companies, hospitals, stations, and other places where security glass is installed.