The QDAT5-0.4-2-31 from Qualink Microwave is a RF Variable Attenuator with Frequency 400 MHz to 2 GHz, Attenuation Range 31 dB, Attenuation Step 1 dB, Attenuation Accuracy 0.5 dB, Insertion Loss 2 dB. Tags: Module with Connectors, Digital. More details for QDAT5-0.4-2-31 can be seen below.