The SYMAIR cell double unit diplexer combines and separates 694–803 MHz and 824–894 MHz signals across two parallel RF paths. Its 4-input and 2-output configuration allows two cellular frequency ranges to share feeder infrastructure while maintaining low insertion loss and high isolation. With DC bypass on all ports, 200 W power handling per port and rugged 7/16 DIN female connectors, this compact unit is suitable for cellular base stations, outdoor radio systems and multiband network upgrades.