The QDDC-1900-2200-50-10-NS from Qualwave is a Dual Directional Coupler with Coupling 10 dB, Coupling Variation ±1 dB, Frequency 1900 to 2200 MHz, Average Power 50 W, Insertion Loss 1.5 dB. Tags: Module with Connectors. More details for QDDC-1900-2200-50-10-NS can be seen below.