The AM1600D173 from Anatech Electronics is a RF Duplexer with Frequency 1626.5 to 1660.5 MHz / 1525 to 1559 MHz, Band 1 1626.5 to 1660.5 MHz, Band 2 1525 to 1559 MHz, Power 5 W, Insertion Loss 1.5 dB. Tags: Surface Mount. More details for AM1600D173 can be seen below.