The AD408-440D392 from Anatech Electronics is a RF Duplexer with Frequency 404 to 412 MHz / 436 to 444 MHz, Band 1 404 to 412 MHz, Band 2 436 to 444 MHz, Insertion Loss 1 dB, Isolation 60 dB. Tags: Module with Connectors. More details for AD408-440D392 can be seen below.