The TDC-10400-30K from Talent Microwave Inc is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±2.6dB, Frequency 1 to 40 GHz, Average Power 30 W, Insertion Loss 2.6 to 3.2 dB. Tags: Module with Connectors. More details for TDC-10400-30K can be seen below.