The QSDC-1290-1310-K1 from Qualwave is a Directional Coupler with Frequency 1290 to 1310 MHz, Coupling 6±1 to 20±1 dB, Directivity 20 dB, Average Power 100 W, Insertion Loss 0.5 to 1.8 dB. Tags: Module with Connectors. More details for QSDC-1290-1310-K1 can be seen below.