The 3853-208 from ARRA Inc. is a RF Variable Attenuator with Frequency 1.5 to 2 GHz, Attenuation Range 20 dB, Attenuation Accuracy ±1 dB, Power 5 W, Peak Power 64.77 dBm. Tags: Module with Connectors, Continuously Variable, Rotary. More details for 3853-208 can be seen below.