The 3205-1E from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency DC to 3 GHz, Attenuation Range 70 dB, Attenuation Step 10 dB, Power 180 W, Insertion Loss 3.75 dB. Tags: Benchtop, Programmable, Digital, USB Controlled, Computer Controlled. More details for 3205-1E can be seen below.