The QDAT6-4-8-31.5 from Qualink Microwave is a RF Variable Attenuator with Frequency 4 to 8 GHz, Attenuation Range 31.5 dB, Attenuation Step 0.5 dB, Attenuation Accuracy 0.5 dB, Insertion Loss 4.5 dB. Tags: Module with Connectors, Digital. More details for QDAT6-4-8-31.5 can be seen below.