The CM1920/1932MK-B3 from G-WAY Microwave is a RF Duplexer with Frequency 806 to 824 MHz / 851 to 869 MHz, Band 1 806 to 824 MHz, Band 2 851 to 869 MHz, Power 60 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for CM1920/1932MK-B3 can be seen below.