4 in 1 design, high-speed reading OTG function is supported, convenient to connect. (For the iPad/iPhone to connect with the mouse, keyboard, USB flash disk and other USB port devices.) Plug and play No computer/ app installation requirements. (Easy & fast to read the movies & documents files) Using while charging, against low power anxiety. (Convenient for working, fully charged after completing the work) Compact and exquisite, easy storage & portable. Tinned copper wire core Stable & premium conductivity, better electromagnetic shielding performance.