The QDDC-2700-3100-K2-40-N from Qualwave is a Dual Directional Coupler with Coupling 40 dB, Coupling Variation ±2 dB, Frequency 2700 to 3100 MHz, Average Power 200 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-2700-3100-K2-40-N can be seen below.