The CDS2x2-43-555/6000 from Radio Frequency Systems is a 90 Degree Hybrid Coupler with Frequency 555 to 6000 MHz, Average Power 300 W, Isolation 18 to 25 dB, Coupling 3.1 dB, VSWR 1.20:1, 1.50:1. Tags: Module with Connectors. More details for CDS2x2-43-555/6000 can be seen below.