This 12 port USB hub is the ideal companion for laptop or desktop computer， specially great for notebooks which come with only a few ports when you need to attach many USB devices at the same time， such as a printer， card reader， mobile phone， MP3/MP4， thumb drive， mouse， keyboard， or an external hard drive. Expand your computer's connectivity with this 12-port USB hub to improve your working efficiency. Features: USB 2.0， backwards compatible with USB1.1. 12 ports with a power switch and 6 LED indicator. Two modes of switch for optional. No need adapter and no need driver program. Plug & play and hot swapping capability. High speed data transfer rate up to 480M bps. Reserves a power connector for power supply when insufficient output. System support Win XP/2000/ME/Vista/7，8 MAC OS 8.6， Linux 2.4 and above. Specifications: Input: USB 5V/3.5A Output: 12 * USB 2.0 Transfer rate: 480 Mbps Color: Black Material: ABS Item size: 16 * 5.2 * 2.1cm / 6.29 * 2.04 * 0.82in (L * W * H) Item weight: 136g / 4.82oz Package size: 23.5 * 16.8 * 6.5cm / 9.25 * 6.61 * 2.55in (L * W * H) Package weight: 213g / 7.52oz Package List: 1 * USB HUB