The AD2755-3055D279 from Anatech Electronics is a RF Duplexer with Frequency 2700 to 2800 MHz / 3000 to 3100 MHz, Band 1 2700 to 2800 MHz, Band 2 3000 to 3100 MHz, Insertion Loss 1 dB, Isolation 40 dB. Tags: Module with Connectors. More details for AD2755-3055D279 can be seen below.