The QDDC-225-460-K5-30-N from Qualwave is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 225 to 460 MHz, Average Power 500 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QDDC-225-460-K5-30-N can be seen below.