Designed for ...Assisted Living The Inovonics single input universal transmitter is designed for use with any standard normally open or normally closed contact (15msec duration) or sensor. Continuous check-ins ensure reliability. This universal transmitter is fully supervised and includes case tamper and battery. Any simpler and itd be hard! -- Well, that doesnt quite make sense. But this does! A Universal transmitter with reliable, self-checking sensor. Fully supervised, it works with your standard NO/NC contact. Also known as -Inovonics Corp 1-ZN X-MITTER W/ TAMPER - IV-EN1210