The 500-F200 from RH Laboratories is a RF Variable Attenuator with Frequency 8 to 18 GHz, Attenuation Accuracy ±0.8 to ±1.6 dB (Flatness), Power 10 mW, Insertion Loss 3.5 dB, Switching Time 1 us (Response). Tags: Module with Connectors, Voltage Controlled. More details for 500-F200 can be seen below.