Description: Easy to use, convenient to carry Can be used for charging connector Support Android 2.3 or above smart phones and tablet with OTG function material: ABS+Metal Operating systems: Windows 98, XP, ME, Vista, 7, Mac 10.45 above and Linux 2.4 or above Supports memory card capacity: Max 128GB Support memory card: SD+Micro SD/T-Flash Transmission rate: USB2.0 480Mb/s Working voltage: DC2.7V - 3.6V Color: Black Package Included: 1 x Card Reader for Smart Phone PC (other accessary not include)