Features Simultaneous Charging: This powered USB hub can be charged simultaneously, saving time and efficiency, with fast compatibility and multiple protection. Wide Applicability: The powered USB hub is suitable for most mobile phones, tablets, MP3s, PDAs, Bluetooth headsets, PSPs, digital cameras, navigators and fast charging tablets on the market. Multiple Protection: This powered USB hub circuit is designed to protect your battery and devices from over voltage, over current, over temperature and short circuit, making it work well. Universal Input Design: This powered USB hub has a universal input design, continuous output voltage and built in anti EMI filtering, with a focus on safe charging of devices Silent Cooling: This powered USB hub is silent, with a powerful fan that draws air while working more quietly to protect the device. Specification: Item Type: Powered USB Hub Material: Stainless steel Model: HD 75 20D Package List:1 x Powered USB Hub Package List 1 x Powered USB Hub