The RFDDC1M2G20 from RF-Lambda is a Dual Directional Coupler with Coupling 18.5 to 23.5 dB, Frequency 0.4 to 2 GHz, Peak Power 5 kW, Average Power 500 W, Insertion Loss 0.3 to 0.8 dB. Tags: Module with Connectors. More details for RFDDC1M2G20 can be seen below.