The 8310-204-F from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency DC to 18.0 GHz, Attenuation Range 62 dB, Attenuation Step 2 dB, Power 50 W, Insertion Loss 3.70 dB. Tags: Benchtop, Rackmount, Programmable, Digital, Computer Controlled. More details for 8310-204-F can be seen below.