The DBDD4000500600A from Qotana is a Dual Directional Coupler with Coupling 39 to 41.5 dB, Frequency 500 MHz to 6 GHz, Peak Power 5 kW, Average Power 250 W, Insertion Loss 0.25 to 0.5 dB. Tags: Module with Connectors. More details for DBDD4000500600A can be seen below.