The QDA-10-18000-63.5-0.5 from Qualwave is a RF Variable Attenuator with Frequency 0.01 to 18 GHz, Attenuation Range 0 to 63.5 dB, Attenuation Accuracy ±2 dB, Insertion Loss 5 dB. Tags: Digital. More details for QDA-10-18000-63.5-0.5 can be seen below.