The RFDDC2G3G40D from RF-Lambda is a Dual Directional Coupler with Coupling 39 to 41 dB, Frequency 2.8 to 3.4 GHz, Peak Power 3 kW, Average Power 300 W, Insertion Loss 0.2 to 0.4 dB. Tags: Module with Connectors. More details for RFDDC2G3G40D can be seen below.