The QPRA-500-40000-63.5-0.5 from Qualwave is a RF Variable Attenuator with Frequency 0.5 to 40 GHz, Attenuation Range 0 to 63.5 dB, Attenuation Accuracy ±0.8 to ±2 dB, Power 0.31 W, Insertion Loss 12 dB. Tags: Module with Connectors, Programmable, Digital. More details for QPRA-500-40000-63.5-0.5 can be seen below.