The Carlon RC4120 is a battery-powered, long-range wireless door chime that offers a convenient and versatile solution for your home alert needs. Its key features include a range of up to 450 feet, ensuring reliable performance even in larger homes. The unit is easy to install with no wiring required, making it a hassle-free solution. It has 13 different sound options, allowing customization to suit your preference. The door chime push button is weather-resistant, ensuring durability and long-lasting use. Its unique selling point is its portability, allowing you to take it anywhere in your home. The Carlon RC4120 provides a perfect blend of convenience, customization, and performance in a wireless door chime.