The VRFC0009-01-BD from VIPER RF is a RF Variable Attenuator with Frequency DC to 20 GHz, Attenuation Range 0.8 to 1 dB, Insertion Loss 1 dB, Supply Voltage -5 to 0 V, Input Return Loss -20 to -15 dB. Tags: Die, Digital. More details for VRFC0009-01-BD can be seen below.