The R&S RSC-Z405 from Rohde & Schwarz is a RF Variable Attenuator with Frequency DC to 40 GHz, Attenuation Range 0 to 75 dB, Attenuation Step 5 dB, Power 1 W, Supply Voltage 150 V. Tags: Rackmount, Programmable, Multi-Channel, System, USB Controlled, Computer Controlled. More details for R&S RSC-Z405 can be seen below.