Hot-swappable, plug and play, no need to install driver This product has four extended USB ports, convenient to use Each interface has an independent switch, safe to use With LED light, the working status is intuitive and visible Use high-quality electronic components to ensure stable operation Operating system: Win95 osR2/98SE/Me/2000/XP/VISTA, for Linux 2.4 and for Mac os8.5 and above Specification: Dimensions: 12cm x 3.5cm x 2.2cm USB cable length: 48-50cm Material: ABS Interface type: USB2.0 Transmission rate: full speed 480Mbps, medium speed 12Mbps, low speed 1.5Mbps Power supply: USB 5V/500mA Operating temperature: 0-70 Storage temperature: 10-90 Package included: 1 x 4-Port USB Hub(with Cable)