The UPD025A from CTS Electronic Components is a RF Duplexer with Frequency 1.85 to 2 GHz, Band 1 1.93 to 2 GHz, Band 2 1.85 to 1.92 GHz, Power 1.5 to 15 W, Insertion Loss 3.5 dB. Tags: Ceramic, Surface Mount. More details for UPD025A can be seen below.