The MM-DDC-005265-20 from Mountain Microwave Technology is a Dual Directional Coupler with Coupling 20 dB, Frequency 0.5 to 26.5 GHz, Average Power 30 W, Insertion Loss 1.8 dB, Directivity 12 dB. Tags: Module with Connectors. More details for MM-DDC-005265-20 can be seen below.