The QDDC-1270-1305-1K-30-7-1 from Qualwave is a Dual Directional Coupler with Coupling 30 dB, Coupling Variation ±1 dB, Frequency 1270 to 1305 MHz, Average Power 1000 W, Insertion Loss 0.15 dB. Tags: Module with Connectors. More details for QDDC-1270-1305-1K-30-7-1 can be seen below.