The ADRF-2PLX-1900-4310 from Advanced RF Technologies is a RF Duplexer with Frequency 1.85 to 1.995 GHz, Power 100 W, Insertion Loss 2 dB, Isolation 95 dB, Operating temperature -10 to 140 Degree F. Tags: Module with Connectors. More details for ADRF-2PLX-1900-4310 can be seen below.