Material: ABS Size: 16 * 3.5 * 2cm/6.30"*1.38"*0.79" (L*W*H) Cable length: 52cm/20.47" USB connecters: 7 Chip: High-speed 2.0 chip USB Interface: USB2.0 interface、 up to 480Mbps、 compatible with USB 1.1 / 1.0 standard Operating voltage: 5V Working Current: 500mA Working temperature: -20 ? - 75 ? Compatible: win95 / 98 / ME / 2000 / XP / vista / win7 / 8 and above versions Features:1. Current protection function、 support overload voltage and instantaneous current protection、 safe and convenient.2. Do not take the power supply can also use the mouse + keyboard + reader + fan + USB Light + 500G mobile hard disk3. No need to install the driver、 support hot swapping. Packing list:1 * 7 interfaces USB socket