The CER0672A from CTS Electronic Components is a RF Duplexer with Frequency 890 to 960 MHz, Band 1 935 to 960 MHz, Band 2 890 to 915 MHz, Power 6 W, Insertion Loss 2.6 to 2.6 dB. Tags: Ceramic, Surface Mount. More details for CER0672A can be seen below.