The BM10066 from Bracke Manufacturing is a RF Variable Attenuator with Frequency 2 to 4 GHz, Attenuation Range 0 to 20 dB, Power 5 W, Insertion Loss 0.5 dB, Operating Temperature -65 to 125 Degree C. Tags: Module with Connectors, Continuously Variable. More details for BM10066 can be seen below.