The CB59-20-200/NF from MCLI is a Directional Coupler with Frequency 800 MHz to 2.5 GHz, Coupling 20 dB, Coupling Variation ±1.3 dB, Directivity 25 dB, Average Power 50 W. Tags: Module with Connectors. More details for CB59-20-200/NF can be seen below.