1. Connect 4 external USB interface devices to expand more possibilities. 2. Built-in overvoltage, overcurrent, short circuit leakage protection modules, each interface has a safety protection mechanism. 3. Adopt intelligent chip, no need to install driver, convenient and fast, plug and play. 4. USB2.0 fast running capability, 480MB/s, backward compatible with USB1.1/1.0. 5. With Micro USB, you can charge your phone. 6. Material: plastic+PVC
