The TDC-10400-20K2 from Talent Microwave Inc is a Dual Directional Coupler with Coupling 20 dB, Coupling Variation ±1.5 dB, Frequency 1 to 40 GHz, Average Power 30 W, Insertion Loss 2.2 to 2.8 dB. Tags: Module with Connectors. More details for TDC-10400-20K2 can be seen below.