The 921-902-948 from Innowave RF is a RF Duplexer with Frequency 935 to 960 MHz / 890 to 915 MHz, Band 1 935 to 960 MHz, Band 2 890 to 915 MHz, Power 250 W, Insertion Loss 0.35 dB. Tags: Module with Connectors. More details for 921-902-948 can be seen below.