The RMCO20.4000-8000Nf from Response Microwave Inc is a Directional Coupler with Frequency 4000 to 8000 MHz, Coupling 20 dB, Directivity 18 dB, Insertion Loss 0.7 dB. Tags: Module with Connectors. More details for RMCO20.4000-8000Nf can be seen below.