STI’s long range Wireless Entry Alert® Chime operates up to 500 feet (line of site). The musical chime helps take the surprise out of unexpected guests. When a protected door is opened, it alerts with one of ten easily selectable sounds. Simple to install, the chime does not require electrical wiring or expensive through-the-wall drilling. May also be used on a window, cabinet, etc. UL/cUL.
More info: www.sti-usa.com/cd109