Connect USB-C 3.1 Macbook or notebook to devices with USB 3.0 A/M connector Allows your iOS devices and standard USB devices to connect to MacBook 12'' through Type-C port Compatible with USB 3.1, USB 3.0, USB 2.0 Aluminum casing minimizes electromagnetic (EM) interference Strengthened connector with aluminum casing ensures a long-lasting product life USB connector connects to devices seamlessly for stable data transmittion