The QDDC-600-2700-K8-50-NS from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1.2 dB, Frequency 600 to 2700 MHz, Average Power 800 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-600-2700-K8-50-NS can be seen below.