The USD002A from CTS Electronic Components is a RF Duplexer with Frequency 1.85 to 1.99 GHz, Band 1 1.93 to 1.99 GHz, Band 2 1.85 to 1.91 GHz, Power 6 to 60 W, Insertion Loss 2.6 to 2.6 dB. Tags: Ceramic, Surface Mount. More details for USD002A can be seen below.