The Unison Echo-Echoflex Interface enables wireless communication between ETC's Unison Echo and Echoflex control systems using a built-in 902 MHz radio with 24 m (80 ft) open-air transmission range. This DIN-rail-mount device features four Echoflex inputs to trigger Echo presets and four Echo zone outputs for controlling Echoflex power products. It connects via EchoConnect two-wire topology-free system using low-voltage Class 2 wiring with 24 VDC auxiliary power. The interface includes onboard configuration tools and status indicators for each input/output. Designed for architectural installations, it operates within 0° to 50°C ambient temperature range and complies with DIN43880 mounting standards. Ideal for retrofits in hospitality, healthcare, conference rooms, retail, and houses of worship where running wires between devices is impractical.