The AD451-475D396 from Anatech Electronics is a RF Duplexer with Frequency 446.25 to 456.25 MHz / 470.745 to 480.475 MHz, Band 1 446.25 to 456.25 MHz, Band 2 470.745 to 480.475 MHz, Insertion Loss 1 dB, Isolation 60 dB. Tags: Module with Connectors. More details for AD451-475D396 can be seen below.