The AE1747-1842DB170 from Anatech Electronics is a RF Duplexer with Frequency 1.735 to 1.76 GHz / 1.83 to 1.855 GHz, Band 1 1.735 to 1.76 GHz, Band 2 1.83 to 1.855 GHz, Insertion Loss 1 dB, Isolation 70 dB. Tags: Module with Connectors. More details for AE1747-1842DB170 can be seen below.