The 651-031-063 from Broadwave Technologies is a RF Variable Attenuator with Frequency DC to 2.2 GHz, Attenuation Range 63 dB, Attenuation Step 1, 2, 4, 8, 16, 32 dB, Attenuation Accuracy ± 0.5 dB, Power 1 W. Tags: Module with Connectors, Programmable, Voltage Controlled. More details for 651-031-063 can be seen below.