The RFDC8M4G30A from RF-Lambda is a Directional Coupler with Frequency 800 MHz to 3.5 GHz, Coupling 29 to 31 dB, Frequency Sensitivity ±0.7 dB, Directivity 20 to 22 dB, Average Power 200 W. Tags: Module with Connectors. More details for RFDC8M4G30A can be seen below.