The RFDC1M8M20 from RF-Lambda is a Directional Coupler with Frequency 100 to 800 MHz, Coupling 19 to 22.6 dB, Frequency Sensitivity ±0.7 dB, Directivity 20 dB, Average Power 400 W. Tags: Module with Connectors. More details for RFDC1M8M20 can be seen below.