The QPRA-20-18000-63.75-0.25 from Qualwave is a RF Variable Attenuator with Frequency 0.02 to 18 GHz, Attenuation Range 0 to 63.75 dB, Attenuation Accuracy ±0.8 to ±2 dB, Power 0.31 W, Insertion Loss 8 dB. Tags: Module with Connectors, Programmable, Digital. More details for QPRA-20-18000-63.75-0.25 can be seen below.