All of the data lines are pure copper products, not on the market and some products like steel or other materials to replace the copper wire, and contact with the mobile phone and charger are copper. To ensure low impedance, low pressure drop, high speed and stable transmission. At the same time with digital fidelity technology requirements, to ensure the stable and continuous data, charging. All data lines are downward compatible with lower versions, such as USB2.0/USB1.1/USB1.0, etc.