The A 4684-20 from ARRA Inc. is a RF Variable Attenuator with Frequency 2.9 to 3.1 GHz, Attenuation Range 20 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 4684-20 can be seen below.