ITEM NAME:Excellent 3 Function Micro USB OTG TF Card Reader for Cell Phone PC MO Feature: Product Name: OTG dual -slot card reader mobile computer USB interface : micro usb / usb Support : SD card / micro SD card Product Dimensions : 51.5 x 19 x 11 mm (L x W x H) A transmission interface :. USB2.0 (micro USB 5pin) + USB A Male Chipset : ITE1327 Slots : 2 slots (SD + micro SD) Transmission speed :. USB2.0 transfer 480Mb / s ( standard value ) Material :. ABS Color: sent at random Operating system : Android 4.2 or later , as the HOST interfaces , Only support for OTG function smart phones and tablet . supports PC operating systems : Windows 2000,2003, XP, Vista, 7, Mac 10.45 or more above and Linux 2.4 operating system . small form factor, easy to carry. USB A male with a micro USB dual- plug design , Smart Phone and PC support dual interface . without data via PC, smartphone and memory card.USB interface : micro usb / usb. USB A male with a micro USB dual- plug design, Smart Phone and PC support dual interface. A transmission interface. USB2.0 (micro USB 5pin) + USB A Male. 1pcs Card Reader.