The Radio Rack 16 - 220 from HJ Technologies is a RF Variable Attenuator with Frequency 700 MHz to 6 GHz, Attenuation Range 0 to 110 dB / 127 dB, Attenuation Step 1 dB / 0.5 dB / 0.25 dB, Attenuation Accuracy 0.3 dB, Power 2 W. Tags: Rackmount, Programmable. More details for Radio Rack 16 - 220 can be seen below.