IP55 Waterproof Design**: This waterproof outdoor wireless doorbell boasts an impressive IP55 waterproof rating, ensuring reliable performance in a variety of weather conditions, from -20°C to 60°C, making it perfect for use outdoors or indoors. - Impressive 300-meter wireless range**: Enjoy seamless connectivity with a range of up to 300 meters in open spaces. Easily install this versatile, long-range wireless doorbell in your home, apartment or office, and expand your system with additional transmitters and receivers. - Customizable Sound Options**: Choose from 55 unique ringtones, including the nostalgic gong melody, with 5 adjustable volume levels up to 110 decibels. - Easy Installation**: Effortlessly install your doorbell using the included double-sided tape or screws, providing flexibility and convenience for any installation. - What You Get & **: Package includes AC receiver * 2, double-sided tape * 1, screwdriver * 1, wall anchor and screw kit * 1, transmitter * 1 - Reliable