The AD820-865D440 from Anatech Electronics is a RF Duplexer with Frequency 817 to 824 MHz / 862 to 869 MHz, Band 1 817 to 824 MHz, Band 2 862 to 869 MHz, Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for AD820-865D440 can be seen below.