The QSDC-1800-2200-K5-50-NS from Qualwave is a Directional Coupler with Frequency 1800 to 2200 MHz, Coupling 50±0.4 dB, Directivity 18 dB, Average Power 500 W, Insertion Loss 0.3 dB. Tags: Module with Connectors. More details for QSDC-1800-2200-K5-50-NS can be seen below.