The AM776-746D316 from Anatech Electronics is a RF Duplexer with Frequency 740 to 752 MHz / 770 to 728 MHz, Band 1 740 to 752 MHz, Band 2 770 to 728 MHz, Power 2 W, Insertion Loss 2.8 dB. Tags: Surface Mount, Ceramic. More details for AM776-746D316 can be seen below.