The AM820-1927D1119 from Anatech Electronics is a RF Duplexer with Frequency 698 to 942 MHz / 1710 to 2145 MHz, Band 1 698 to 942 MHz, Band 2 1710 to 2145 MHz, Power 2 W, Insertion Loss 1.2 to 1.5 dB. Tags: Surface Mount, Ceramic. More details for AM820-1927D1119 can be seen below.