The DP-R17101785W-T18051880W from AceWavetech is a RF Duplexer with Frequency 1805 to 1880 MHz(TX), 1710 to 1785 MHz(RX), Band 1 1805 to 1880 MHz(TX), Band 2 1710 to 1785 MHz(RX), Insertion Loss 0.8 dB, Isolation 100 dB. Tags: Module with Connectors. More details for DP-R17101785W-T18051880W can be seen below.