The PT040-0S from R & K Company Limited is a RF Variable Attenuator with Frequency DC to 4 GHz, Attenuation Range 0 to 85 dB, Attenuation Accuracy 0.5 to 1 dB, Power 0.25 W, IIP3 40 dBm. Tags: Module with Connectors, Digital. More details for PT040-0S can be seen below.