Introducing the Aiphone NIM-40B 40-Call Master Station with Handset, the perfect solution for managing communication across multiple locations. This advanced master station supports up to 40 door stations, sub stations, ceiling speakers, and wall jacks, ensuring seamless connectivity. With features like Selective Call, Group Call, and All Call, you can easily manage your communication needs. Enjoy personalized sound control with adjustable volume settings, and experience enhanced privacy with the included handset. Elevate your communication system today with the Aiphone NIM-40B – your reliable partner in connectivity!