The V0039 from Custom Microwave Components is a RF Variable Attenuator with Frequency 500 MHz to 1 GHz, Attenuation Range 80 dB, Insertion Loss 2 dB, Operating Temperature -55 to 85 Degree C, Storage Temperature -65 to 125 Degree C. Tags: Module with Connectors, Drop In, Continuously Variable. More details for V0039 can be seen below.