The AD442-456D384 from Anatech Electronics is a RF Duplexer with Frequency 440 to 444 MHz / 453 to 460 MHz, Band 1 440 to 444 MHz, Band 2 453 to 460 MHz, Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for AD442-456D384 can be seen below.