Four Ports With Independent Switch Usb2.0 Hub Each Output Port Has Independent Power Switch Control, Which Can Avoid Frequent Plugging And Unplugging, And Is More Convenient To Use And Manage! With An External Power Supply Interface, It Can Be Equipped With A High-current Device Such As A Mobile Hard Disk And Charging. Description: 1. This Product Is A USB-bundled 2.0 High-speed Verswith A Maximum Speed Of Up To 12M/S And Backward Compatibility. 2. Support WIN7/ XP/ WIN2000/ WIN2003/ VISTA, The