Check the listing for details. Kratos/General Microwave Programmable RF Attenuator 2-4 GHz 64dB 3492-64 tested. Condition: Used. Listed at 35.00 USD. General Microwave/Kratos Pin Diode step attenuator, 3492-64, 2-4 GHz max atten 64 dB, min step .03 dB. my analyzer covers only up to 3 GHz, I tested these (I have several different models) but I couldn't test them over their relevant frequency range, what I could confirm is that I could see some change in amplitude for each but the smallest step sizes. The tech data for these is on line at the Kratos site, here: https://www.kratosmed.com/gmcatalog/microwave-attenuators/series-349-and-349h-octave-band-11-bit-digital-pin-diode-attenuators. I will list the others (of the 349 series) separately. Note - I will show the same pictures, I tested every one of these to see that they were not dead, I don't think it's all that helpful unless I had some much fancier test equipment to try to check every detail of the operation. Note to me: top gray drawerI normally ship within 24 hours of your order, but the post office does not always initiate tracking when I put the packages in the drop off box. Check out my other items!