Up to 4,000 ft. wireless range works great for large homes, businesses, and warehouses
Compatible with other ERA system transmitters & receivers (add up to 12 transmitters & unlimited receivers)
Dual-function transmitter can either be used as a push-button doorbell or a door contact sensor depending on your needs
Receiver can be programmed to up to 4 zones, each using a distinct tone or melody so you know which transmitter triggered the alert from which location