The AM900D712 from Anatech Electronics is a RF Duplexer with Frequency 880 to 915 MHz / 925 to 960 MHz, Band 1 880 to 915 MHz, Band 2 925 to 960 MHz, Power 1 W, Insertion Loss 3.8 to 3.9 dB. Tags: Surface Mount. More details for AM900D712 can be seen below.