The 4843-20 from ARRA Inc. is a RF Variable Attenuator with Frequency 2 to 4 GHz, Attenuation Range 20 dB, Attenuation Accuracy ±1.5 dB, Power 5 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for 4843-20 can be seen below.