The AD457-497D385 from Anatech Electronics is a RF Duplexer with Frequency 440 to 475 MHz / 485 to 510 MHz, Band 1 440 to 475 MHz, Band 2 485 to 510 MHz, Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for AD457-497D385 can be seen below.