Product information: WD5080A IQ America products increase security to your property, save energy/money, and help to welcome your visitors. Our products encompass a variety of solutions for your home and business. IQ America products are synonymous with innovation and quality. IQ America offers a wide variety of entry notification products. Our modern designs, built-in intelligence and a category-leading sound offering set our doorbells and buttons apart. IQ America's entry notification products can help achieve that peace of mind. From our traditional offerings to new innovative products, our set of solutions can transform your home to a welcoming AND SAFE environment. IQ America offers a variety of product types, including: Wired and Wireless options, Intelligent Hybrid Doorbell Technology, WI-FI Enabled Technology, Video/Audio, 2-Way Communication, Specialized Entry Solutions, Products for both home and business. This Plug-in receiver chimes when someone opens a door or window. Features distinct sounds for open and closed. Kit includes a wireless door/window transmitter and a wireless chime receiver. Transmitter activates when the door or window is opened, sends a wireless signal to the receiver and sends another signal when the door or window is closed. Benefits: Wireless entrance alert chime. Chimes when someone opens a door or window. Features distinct sounds for open and closed. Kit includes a wireless door/window transmitter and a wireless chime receiver. Ideal for small businesses, stores, workshops, and churches Requires 3 C batteries