The AD1945-2135D397 from Anatech Electronics is a RF Duplexer with Frequency 1940 to 1950 MHz / 2130 to 2140 MHz, Band 1 1940 to 1950 MHz, Band 2 2130 to 2140 MHz, Power 100 W, Insertion Loss 0.4 to 0.9 dB. Tags: Module with Connectors. More details for AD1945-2135D397 can be seen below.