The AD902-947D211 from Anatech Electronics is a RF Duplexer with Frequency 890 to 915 MHz / 935 to 960 MHz, Band 1 890 to 915 MHz, Band 2 935 to 960 MHz, Power 50 W, Insertion Loss 1.4 dB. Tags: Module with Connectors. More details for AD902-947D211 can be seen below.