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Smart Networking and Power Supply: The intercom system features a smart networking mode that can be set up in three simple steps. It offers two power supply options: battery power with a standby time of about two months, and direct power supply for uninterrupted use. Large Network Capacity: The intercom system can network up to 999 main or extension units simultaneously, making it ideal for large office settings. The extension units can call the main unit with just one button, providing convenience for users. Adjustable Settings and Accessories: The intercom system offers 38 ringtone options and 7 adjustable volume levels for both ringtones and call volume. It can be used with a headset in noisy environments and can be connected to a large external speaker. The device is powered by a 2000mAh lithium battery and operates at a frequency of 410MHz-460MHz. Long-Range and Clear Communication: Our smart digital voice call business intercom system offers duplex communication with a range of up to 1000 meters. With a signal amplifier, the communication distance can reach up to 2000 meters. The device features a rotatable external antenna for stronger and more stable signals, ensuring clear and interference-free communication. High-End and Versatile Design: The intercom system features a high-end design with a body made of plastic and aluminum alloy, making it durable and aesthetically pleasing. It can be used in various scenarios and can be easily installed on the wall with adhesive glue without the need for screws.