The CVA20-40/D from MCLI is a RF Variable Attenuator with Frequency 4 to 12.4 GHz, Attenuation Range 40 dB, Power 7 W, Peak Power 64.77 dBm, Insertion Loss 0.5 dB. Tags: Module with Connectors, Continuously Variable, Rotary. More details for CVA20-40/D can be seen below.