The AM1740-2140D1030 from Anatech Electronics is a RF Duplexer with Frequency 1710 to 1770 MHz / 2110 to 2170 MHz, Band 1 1710 to 1770 MHz, Band 2 2110 to 2170 MHz, Power 2 W, Insertion Loss 2 dB. Tags: Surface Mount, Ceramic. More details for AM1740-2140D1030 can be seen below.