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Specifications USB 3.0 Male Port : 4 x USB 3.0 Female Ports Support System: Windows XP/Vista/7/8/8.1/Mac 9.1 and above
Important Notes 1.The devices connected to the 4-Port USB 3.0 Hub must not exceed a combined current of 5 volts 900 mAh. 2.External hard-drives should be connected to an external power source. 3.This item does not charge iPad or any other devices which have irregular charging requirements.