The AM1440-1488D1057 from Anatech Electronics is a RF Duplexer with Frequency 1475 to 1501 MHz / 1427 to 1453 MHz, Band 1 1475 to 1501 MHz, Band 2 1427 to 1453 MHz, Power 3 W, Insertion Loss 3 dB. Tags: Surface Mount, Ceramic. More details for AM1440-1488D1057 can be seen below.