The MM-DDC-040120-40 from Mountain Microwave Technology is a Dual Directional Coupler with Coupling 40 dB, Frequency 4 to 12 GHz, Average Power 50 W, Insertion Loss 1.4 dB, Directivity 14 dB. Tags: Module with Connectors. More details for MM-DDC-040120-40 can be seen below.