Specification:*Expand by connecting up to 4 USB 2.0、 or 1.1 devices to any USB 2.0 capable computer*Supports USB 2.0 transfer rates up to 480 Mbps. *4 per-port LEDs. * All 4 ports on one side to minimize cable clutter.* Voltage: 5V*Electric current: 500mAMaterial: ABSSize: 10CM cable linePackage: 1 4-Port USB Hub