The CD-2-1700-2100-30-30-500-NM-NF-SF / 001677 from DETI Microwave is a Dual Directional Coupler with Coupling 30 dB, Frequency 1.7 to 2.1 GHz, Average Power 500 W, Insertion Loss 0.1 dB, Directivity 27 dB. Tags: Module with Connectors. More details for CD-2-1700-2100-30-30-500-NM-NF-SF / 001677 can be seen below.