The RMCO6.490Nf from Response Microwave Inc is a Directional Coupler with Frequency 450 to 490 MHz, Coupling 6 +/- 0.1 dB, Coupling Variation 0.1 dB, Directivity 18 dB, Average Power 50 W. Tags: Module with Connectors. More details for RMCO6.490Nf can be seen below.