The RMDU.1850-1995Nf from Response Microwave Inc is a RF Duplexer with Frequency 1850 to 1915 MHz(UL) / 1930 to 1995 MHz(DL), Band 1 1850 to 1915 MHz(UL), Band 2 1930 to 1995 MHz(DL), Power 50 W, Insertion Loss 1.2 dB. Tags: Module with Connectors. More details for RMDU.1850-1995Nf can be seen below.