The JFCD1710T1880SF from JQL Electronics is a RF Duplexer with Frequency 1.71 to 1.88 GHz, Band 1 1.71 to 1.78 GHz, Band 2 1.8 to 1.88 GHz, Power 10 W, Insertion Loss 1.5 to 3 dB. Tags: Module with Connectors. More details for JFCD1710T1880SF can be seen below.