The ZDDC10-K0144 from Mini Circuits is a Dual Directional Coupler with Coupling 10 dB, Coupling Variation ±0.8 to 1.2 dB( Flatness), Frequency 1 to 40 GHz, Power 16 W, Insertion Loss 1.4 to 3.7. Tags: Module with Connectors. More details for ZDDC10-K0144 can be seen below.