The QCAK1 from Qualwave is a RF Variable Attenuator with Frequency 0.9 to 10.5 GHz, Attenuation Range 10, 12, 15, 20 dB, Attenuation Accuracy ±0.5 to ±1 dB, Power 100 W, Insertion Loss 1 to 1.5 dB. Tags: Module with Connectors, Continuously Variable. More details for QCAK1 can be seen below.