The QDA-18000-50000-31.5-0.5 from Qualwave is a RF Variable Attenuator with Frequency 18 to 50 GHz, Attenuation Range 0 to 31.5 dB, Attenuation Accuracy ±2 dB, Insertion Loss 11 dB. Tags: Digital. More details for QDA-18000-50000-31.5-0.5 can be seen below.