The Unison Echo-Echoflex Interface allows for wireless communication between Unison Echo® and Echoflex control systems. When it’s not practical to run wires between every device in your building’s control system, the Echo-Echoflex Interface is the solution. Using the built-in 902MHz radio the Echo-Echoflex Interface can transmit or receive wireless signals to communicate with any Echoflex control device within 80feet (24meters). And since the Echo-Echoflex Interface is a DIN-rail-mount device, you can install it nearly anywhere.