Specifications:Built-in current overload short circuit protection device.Use high-quality electronic devices to ensure stable operation.The computer automatically recognizes the installation, without the driver, plug and play, plugging and unplugging.Support: For Windows 95/98/ME/2000/XP/Vista, for Mac 8.6 or later.High speed USB 3.0 interface, the theoretical maximum speed can reach 5GB/s, backward compatible with USB 2.0/1.1.Equipped with 4 sets of USB jacks with hot plug function.Current protection, overload voltage and instantaneous current protection, safe and convenient to use.Type: USB 3.0 4 Ports HubMaterial: PlasticWorking Humidity: 10% - 90%Working Voltage: 5VWorking Current: 500mAWorking Temperature: -20 ~ 75 Degree CelsiusStorage Temperature: -40 ~ 85 Degree CelsiusFeatures: Portable, 4 Ports, High Speed, With On/Off SwitchSize: 11.5cm x 4.5cm x 2cm/4.53" x 1.77" x 0.79" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes1 x USB 3.0 4 Ports Hub