Specifications:Allows simultaneous operation of up to four separate devices all connected to a single USB port.Current protection function, support overload voltage and instantaneous current protection function, safe and convenient to use.Portable and lightweight, easy to carry and use.This 4-port USB hub is the ideal companion for laptop or desktop computers.Item Name: USB HubMaterial: ABS Casing + Copper WireInterface: USB 2.0 (Compatible with USB 1.1/1.0)Working Indicator Light: YesWorking Humidity: 10 Percent - 90 PercentWorking Voltage: 5VWorking Current: 500mAWorking Temperature: -20 Degree Celsius - 75 Degree CelsiusStorage Temperature: -40 Degree Celsius - 85 Degree CelsiusCompatible System: for Windows 95/98/2000/2003/ME/XP/Vista, for Mac OS 8.1 and above (Drivers Need to Be Installed for Windows 95/98)Features: Portable, Mini Size, 4 USB Ports, Current Protection, Easy to CarryCable Length: 15cm/5.91" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x USB Hub