The AM754-784D1052 from Anatech Electronics is a RF Duplexer with Frequency 746 to 763 MHz / 776 to 793 MHz, Band 1 746 to 763 MHz, Band 2 776 to 793 MHz, Power 3 W, Insertion Loss 3 dB. Tags: Surface Mount, Ceramic. More details for AM754-784D1052 can be seen below.