This Wireless Door/Window Open Chime Kit is a new open box security alert system that includes a doorbell receiver and battery. The chime is white in color and is made of plastic, with dimensions of 3 inches in length and width. It is suitable for use in homes, schools, and shops, and offers wireless connectivity with a portable bell/chime feature. The chime is powered by a single battery and can be connected to Wi-Fi or wall plug-in power sources. Ideal for enhancing security and safety at your front door or window.
eBay