The 4813-15A from ARRA Inc. is a RF Variable Attenuator with Frequency 3 to 4 GHz, Attenuation Range 15 dB, Power 5 W, Peak Power 64.77 dBm, Insertion Loss 0.5 dB. Tags: Module with Connectors, Rotary, Continuously Variable. More details for 4813-15A can be seen below.