The QDDC-0.25-300-1K from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±2 dB, Frequency 0.25 to 300 MHz, Average Power 1000 W, Insertion Loss 0.5 dB. Tags: Module with Connectors. More details for QDDC-0.25-300-1K can be seen below.