- Extended Standby Life : Enjoy up to 4 months of standby time with low power consumption, making this outdoor bell reliable for long-term use. - Versatile Mobile Interphone : Features a large, adjustable speaker for clear voice communication. Use it as a mobile interphone for added convenience. - Impressive Working Range : Achieve a maximum operational distance of 200 meters (656.2 feet) in open areas, ensuring connectivity even from afar. - Flexible Power Supply : The outdoor bell operates on 4 AAA batteries (not included), allowing for easy battery replacement. The indoor unit connects via an external USB data cable for continuous power. Practical Use Scenarios : 1. Home Security : Install at your front door to communicate with visitors without opening the door, enhancing your home’s security. 2. Large Properties : Ideal for use in spacious homes, farms, or warehouses where long-distance communication is necessary. 3. Events and Gatherings : Perfect for outdoor events, enabling guests to reach you easily without needing to move around frequently. With its combination of durability, functionality, and user-friendly features, this outdoor bell is a practical addition to any home or business.