The 8310-136-2-F from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency 800 MHz to 2.5 GHz, Attenuation Range 63.75 dB, Attenuation Step 0.25 dB, Power 50 W, Insertion Loss 6.0 dB. Tags: Benchtop, Programmable, Digital, Computer Controlled. More details for 8310-136-2-F can be seen below.