Two different ways to communicate Two-way audio recording Noise reduction and anti-interrruption A slim-fitting loudspeaker design Simple design: the extension features an integrated speaker, and the main unit is encased in an aluminum alloy shell. This system is easy to connect and operate on your own. HIGH QUALITY: Both the speaker and the microphone in this system are of the highest caliber. The metal tube microphone is particularly useful for the counter and two-way communication. Excellent work: This system has a clear, organic sound. The volume can be adjusted with just a key. Advanced Technology: We use a state-of-the-art microcomputer from the United States for this system. SPECIFIC GUIDELINES: The track's operational status is indicated by the indicator light. Easy Operation I: Bidirectional communication is simple and requires no button pressing. Easy