The AD751-781D320 from Anatech Electronics is a RF Duplexer with Frequency 746 to 757 MHz / 776 to 787 MHz, Band 1 746 to 757 MHz, Band 2 776 to 787 MHz, Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for AD751-781D320 can be seen below.