The CA3-20/D from MCLI is a RF Variable Attenuator with Frequency 5.4 to 5.9 GHz, Attenuation Range 20 dB, Attenuation Accuracy 1 dB, Power 7 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for CA3-20/D can be seen below.