Product Description for Self-Generating Wireless Doorbell Set Enhance the convenience and security of any environment with our Self-Generating Wireless Doorbell Set, a versatile and eco-friendly solution designed for modern living. This innovative system is perfect for a variety of settings, offering reliable performance without the need for batteries. Explore the features that make this doorbell set an indispensable addition to your home or office: Wide Application: Equipped with two doorbell transmitters and two receivers, this set is ideal for diverse locations such as homes, apartments, offices, schools, and hospitals. Its versatile application ensures effective communication across various environments. Self-Generating Technology: Forget about changing batteries. This doorbell utilizes cutting-edge technology to convert kinetic energy into electrical energy with each press of the button, providing a sustainable, hassle-free operation. Strong Signal Penetration: With a 433.92MHz wireless signal, this doorbell system offers exceptional penetration capability, able to transmit through 3-4 doors. It boasts an impressive receiving distance of up to 150 meters in open areas, ensuring consistent and reliable performance. Adjustable Melodies and Volume: Customize your alert experience with 38 different ringtones. This system allows for three adjustable volume levels and includes a silent mode, enabling you to tailor the sound to suit different scenarios and preferences. Multipurpose Functionality: This device is not just a doorbell; it also functions as a siren, making it suitable for assisting the elderly, babies, pregnant women, and individuals who may need to signal for help in emergencies, providing added peace of mind. Easy Installation: Designed with an IP44 waterproof rating, this doorbell can withstand the elements, ensuring durability and functionality both indoors and outdoors. Installation is straightforward with the included strong double-sided tape, requiring no wiring or wall damage. For a more permanent setup, screws are also provided. Upgrade your communication and safety systems with our Self-Generating Wireless Doorbell Set. Its combination of innovative technology, user-friendly features, and durable design makes it an essential tool for ensuring convenience and security in any setting.