The DP-R18501910D-T19301990D from AceWavetech is a RF Duplexer with Frequency 1930 to 1990 MHz(TX), 1850 to 1910 MHz(RX), Band 1 1930 to 1990 MHz(TX), Band 2 1850 to 1910 MHz(RX), Insertion Loss 0.8 dB, Isolation 65 dB. Tags: Module with Connectors. More details for DP-R18501910D-T19301990D can be seen below.