The AM1539-1650D1181 from Anatech Electronics is a RF Duplexer with Frequency 1518 to 1559 MHz / 1626.5 to 1675 MHz, Band 1 1518 to 1559 MHz, Band 2 1626.5 to 1675 MHz, Power 3 W, Insertion Loss 1.4 to 1.6 dB. Tags: Surface Mount, Ceramic. More details for AM1539-1650D1181 can be seen below.