The DP-R19101990W-T21102390W from AceWavetech is a RF Duplexer with Frequency 2110 to 2390 MHz(TX), 1910 to 1990 MHz(RX), Band 1 2110 to 2390 MHz(TX), Band 2 1910 to 1990 MHz(RX), Insertion Loss 0.8 dB, Isolation 100 dB. Tags: Module with Connectors. More details for DP-R19101990W-T21102390W can be seen below.