The QDDC-1000-50000-20-13-2 from Qualwave is a Dual Directional Coupler with Coupling 13 dB, Coupling Variation ±1.6 dB, Frequency 1000 to 50000 MHz, Average Power 20 W, Insertion Loss 3 dB. Tags: Module with Connectors. More details for QDDC-1000-50000-20-13-2 can be seen below.