The S-204 from Stellant Systems is a Diplexer with Frequency f1 1750 to 1850 MHz, Frequency f2 2160 to 2500 MHz, Power 10 to 16 W, Attenuation 35 to 100 dB, Attenuation f1 35 to 100 dB. Tags: Module with Connectors, Combline. More details for S-204 can be seen below.