Fitian SD and USB 3.0 Card Reader Flash Memory with OTG Function for Windows, Mac, Linux, and Certain Android Systems (5gbps, 2 Slots) Wirelessly connects to your mobile devices that support USB On-The-GO (USB OTG) ;SuperSpeed USB 3.0 interface; backwards compatible with USB 2.0 High speed data transfer up tp 5Gbps; Fast transfer rate for reliable copy/download/backup. Support the android 2.3 or above. Combining Micro USB and standard USB. Powers via USB port, No Wi-Fi, network, or battery required. With a small indicator light reminding it works or not. Miro SD/SDHC is not included