The ZDDC10-K0644 from Mini Circuits is a Dual Directional Coupler with Coupling 10 dB, Coupling Variation ±0.4 to 1 dB( Flatness), Frequency 6 to 40 GHz, Power 16 W, Insertion Loss 1.5 to 2.8 dB. Tags: Module with Connectors. More details for ZDDC10-K0644 can be seen below.