The AM800-770D1077 from Anatech Electronics is a RF Duplexer with Frequency 764 to 776 MHz / 794 to 806 MHz, Band 1 764 to 776 MHz, Band 2 794 to 806 MHz, Power 3 W, Insertion Loss 3.5 dB. Tags: Surface Mount, Ceramic. More details for AM800-770D1077 can be seen below.