The HG137S from Microarray Technologies Corporation is a RF Variable Attenuator with Frequency DC to 24 GHz, Attenuation Range 1.75 dB, Attenuation Accuracy -0.5 to 0.1 dB, Power 0.5 W, Insertion Loss 1 dB. Tags: Surface Mount, Digital, Voltage Controlled. More details for HG137S can be seen below.