The RMCO20.3400-3600Nf from Response Microwave Inc is a Directional Coupler with Frequency 3400 to 3600 MHz, Coupling 20 dB, Directivity 15 dB, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for RMCO20.3400-3600Nf can be seen below.