The UPD030A from CTS Electronic Components is a RF Duplexer with Frequency 2.31 to 2.36 GHz, Band 1 2.35 to 2.36 GHz, Band 2 2.31 to 2.32 GHz, Power 1.5 to 15 W, Insertion Loss 3 dB. Tags: Ceramic, Surface Mount. More details for UPD030A can be seen below.