The CER0703C from CTS Electronic Components is a RF Duplexer with Frequency 1.92 to 2.17 GHz, Band 1 2.11 to 2.17 GHz, Band 2 1.92 to 1.98 GHz, Power 20 to 200 W, Insertion Loss 1.6 dB. Tags: Ceramic, Surface Mount. More details for CER0703C can be seen below.