SAMZHE USB 2.0 High Speed Extention Cable 5 Feet USB2.0 is compatible with USB1.1, good in workmanship. It promotes the transmission speed, meanwhile and enhances disturbance resistance Adopting STP and dual ferrite cores, its resistance of disturbance is better. And signal transmission is more stable Mains lead is low lead and cadmium with SR-PVC insulation, earth wire is Tin copper wire with metal braid shield. And it has passed the UL VW-1 vertical flammability test Good in disturbance resistance of dual ferrite cores, It's low attenuation coefficient and good effect Environmental plastic, novel, durable, environmental, professional. 1-year limited warranty by SAMZHE