The RMDU.1920-2170Nf from Response Microwave Inc is a RF Duplexer with Frequency 1920 MHz to 1980 MHz(RX) / 2110 to 2170 MHz(TX), Band 1 1920 to 1980 MHz (RX), Band 2 2110 to 2170 MHz(DL), Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors. More details for RMDU.1920-2170Nf can be seen below.