The LDDC-6/18-40N-500W from Leader-MW is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±1 dB, Frequency 6 to 18 GHz, Average Power 350 to 500 W, Insertion Loss 0.6 to 0.8 dB. Tags: Module with Connectors. More details for LDDC-6/18-40N-500W can be seen below.