The ZDDC10-K1844 from Mini Circuits is a Dual Directional Coupler with Coupling 10 dB, Coupling Variation ±0.3 to 0.7 dB( Flatness), Frequency 18 to 40 GHz, Power 16 W, Insertion Loss 1.7 to 2.8 dB. Tags: Module with Connectors. More details for ZDDC10-K1844 can be seen below.