The QSA40 from Qualwave is a RF Variable Attenuator with Frequency DC to 40 GHz, Attenuation Range 0 to 9 dB, Attenuation Accuracy 1.2 to 1.5 dB, Power 2 W, Peak Power 0.2 kW. Tags: Module with Connectors, Rotary. More details for QSA40 can be seen below.