The QDA-8500-9500-31.5-0.25 from Qualwave is a RF Variable Attenuator with Frequency 8.5 to 9.5 GHz, Attenuation Range 0 to 31.5 dB, Attenuation Accuracy 0.945 to 1.575 dB (3 to 5 %), Power 1 W, Insertion Loss 5.5 dB. Tags: Module with Connectors, Digital. More details for QDA-8500-9500-31.5-0.25 can be seen below.