The QDDC-0.009-260-3K5-50-7S from Qualwave is a Dual Directional Coupler with Coupling 50 dB, Coupling Variation ±1 dB, Frequency 9 kHz to 260 MHz, Average Power 3500 W, Insertion Loss 0.25 dB. Tags: Module with Connectors. More details for QDDC-0.009-260-3K5-50-7S can be seen below.