The QDA-30000-40000-30-0.5 from Qualwave is a RF Variable Attenuator with Frequency 30 to 40 GHz, Attenuation Range 0 to 30 dB, Attenuation Accuracy 0.9 to 1.5 dB (3 to 5 %), Power 0.31 W, Insertion Loss 5.5 dB. Tags: Module with Connectors, Digital. More details for QDA-30000-40000-30-0.5 can be seen below.