1.[INTERCOM COMMUNICATION SYSTEM]: Intercom systems for clear, direct communication between home or office, making it easier to coordinate and share information. And the alert alarm function for potential elderly or emergencies, helping to ensure a quick response. They can get timely and considerate care without yelling just need to hold the button and talk with them. 2.[LONG RANGE]: Intercoms for adults have pretty clear audio even at long distances, just make sure you're on the same channel. Intercom support up to 1000m of communication range in open fields, 20 to 50m through wall. Whether you are upstairs, downstairs, or not far from the farm, you can talk to each other anytime. 3.[DURABLE LI-ION BATTERY]: Each intercom comes with 2000mAh lithium rechargeable batteries and a recharging adapter that allows up to 2 intercoms to be charged at once. The intercom can be used for 5-6 days with a full charge. We suggest that the indoor intercom stay in the charge station after use or charge the indoor machine once every 1 week. 4.[APPLICATION SCENARIO]: This wireless intercom system can use in a wide range, making them ideal for hotels, restaurants, shopping malls, warehouses, family , security, and school . Intercoms allow family members to communicate easily and quickly with each other from different rooms or areas of the house.