The AD455-499D394 from Anatech Electronics is a RF Duplexer with Frequency 438 to 473 MHz / 487 to 512 MHz, Band 1 438 to 473 MHz, Band 2 487 to 512 MHz, Insertion Loss 1 dB, Isolation 60 dB. Tags: Module with Connectors. More details for AD455-499D394 can be seen below.