The RMDI.1990Sf from Response Microwave Inc is a Diplexer with Frequency f1 1850 to 1910 MHz, Frequency f2 1930 to 1990 MHz, Power 50 W, Attenuation 70 dBc, Insertion loss 1 dB. Tags: Module with Connectors, Cavity. More details for RMDI.1990Sf can be seen below.