The KBK-746S from Synergy Microwave Corporation is a Bi-Directional Coupler with Frequency 1 MHz to 2 GHz, Coupling 10.5 to 11.5 dB, Coupling Variation ±1 dB (Flatness), Power 1 W, Insertion Loss 1.6 to 2.8 dB. Tags: Module with Connectors. More details for KBK-746S can be seen below.