The KEK-704DH-2 from Synergy Microwave Corporation is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±0.25 dB (Flatness), Frequency 850 MHz to 1.25 GHz, Average Power 500 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for KEK-704DH-2 can be seen below.