The USD013A from CTS Electronic Components is a RF Duplexer with Frequency 746 to 787 MHz, Band 1 746 to 756 MHz, Band 2 777 to 787 MHz, Power 6 to 60 W, Insertion Loss 2.6 to 2.6 dB. Tags: Ceramic, Surface Mount. More details for USD013A can be seen below.