Get instant emergency messages with the Veetronix alert receiver, Model 2TR9A. The tone and monitor features allow you to have it in alert ready mode or 24/7 monitoring. An optional remote switching output (RSO) allows direct connections to other devices such as sirens, alarms or speaker systems. Add the optional battery back up for security and power fail protection. Ideal for daycare centers, schools, factories, motels, public safety and your own home.