The KDS-30-30 from Synergy Microwave Corporation is a Bi-Directional Coupler with Frequency 30 to 512 MHz, Coupling 27.5 dB, Coupling Variation ±0.75 dB (Flatness), Power 50 W, Insertion Loss 0.28 dB. Tags: Surface Mount. More details for KDS-30-30 can be seen below.