This hub does not apply to charging, only for data transmission. Specification: 4port USB Hub, USB Version: 2.0, Cable Length: 0.45m, Support system: for Mac/Vista/Windows, Support Devices: Cellphone/Tablet/USB Driver/OTG/PC/Laptop, Size: 76*24*24mm, Material: ABS, Shell manufacturing technique: Polished Alloy, Anti-skip, anti-fingerprint. Parameter: USB binding 2.0 chip, high speed chip, Equipped with four sets of USB jacks with hot plug function, Current protection function, support overload voltage and instantaneous current protection function, safe and convenient to use. Package Included: 1 x Mini USB 2.0 Hi-Speed 4-Port Splitter Hub Adapter For PC Computer