The A 6684-40 from ARRA Inc. is a RF Variable Attenuator with Frequency 11.7 to 12.2 GHz, Attenuation Range 40 dB, Attenuation Accuracy ±0.5 dB, Power 10 W, Peak Power 66.99 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for A 6684-40 can be seen below.