The AM779-749D318 from Anatech Electronics is a RF Duplexer with Frequency 740 to 788 MHz / 770 to 758 MHz, Band 1 740 to 788 MHz, Band 2 770 to 758 MHz, Power 2 W, Insertion Loss 2.8 dB. Tags: Surface Mount, Ceramic. More details for AM779-749D318 can be seen below.