Features: All-aluminum USB hub. Fine craftsmanship, sturdy metal casing protects against breakage and is more durable than plastic. Fast data transfer, 1 port USB 3.0 Hub, 3 ports USB 2.0, data transfer without waiting, fast and efficient. USB charger can charge four phones simultaneously, USB Hub Extensions very powerful. Mini portable and easy to carry, keep your desk clean. Nicer work and play. Hub Extensions meet the device's multi-port expansion requirements. Charging, USB flash drive, mouse, keyboard. Built-in smart chips and exclusive multi-protection systems to avoid overcurrent, overvoltage, short circuit, and high temperature for safety and excellent performance. Specifications: Material: Aluminum Number of Ports: 4 Data Transfer Rate: 5 Gbit/s Product Size: Approx. 8x1.6x0.7cm/3.15x0.63x0.28in Hardware Interface: USB 3.0 USB 2.0 Color: Gray Silver Note: No retail package. Please allow 0-1cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you. Package includes: 1 pc x 4 Port USB Data Hub