The USD012A from CTS Electronic Components is a RF Duplexer with Frequency 698 to 746 MHz, Band 1 728 to 746 MHz, Band 2 698 to 716 MHz, Power 6 to 60 W, Insertion Loss 2.6 to 2.6 dB. Tags: Ceramic, Surface Mount. More details for USD012A can be seen below.