The AM1842-2140D1187 from Anatech Electronics is a RF Duplexer with Frequency 1804.5 to 1880.5 MHz / 2102 to 2178 MHz, Band 1 1804.5 to 1880.5 MHz, Band 2 2102 to 2178 MHz, Power 3 W, Insertion Loss 3 dB. Tags: Surface Mount, Ceramic. More details for AM1842-2140D1187 can be seen below.