The USD027A from CTS Electronic Components is a RF Duplexer with Frequency 806 to 869 MHz, Band 1 851 to 869 MHz, Band 2 806 to 824 MHz, Power 6 to 60 W, Insertion Loss 2.6 to 2.6 dB. Tags: Ceramic, Surface Mount. More details for USD027A can be seen below.