The USD020A from CTS Electronic Components is a RF Duplexer with Frequency 791 to 862 MHz, Band 1 791 to 821 MHz, Band 2 832 to 862 MHz, Power 6 to 60 W, Insertion Loss 2.6 to 2.6 dB. Tags: Ceramic, Surface Mount. More details for USD020A can be seen below.