Lucco OTG USB 3.0 with Micro SD/TF Card Reader Adapter for Android OTG Enabled Smartphone Tablet/Laptop/Computer/Chromebook(Card Reader) 2 in 1 card reader with OTG, SD, Micro SD. LED card insertion and data transfer activity indicator. Simplest solution for accessing and transferring files from microSD cards to mobile devices/computer. Innovative card reader with OTG function facilitates to transfer data for tablets and mobile phones. Support USB 3.0 high speed transfer rate, no driver installation needed. Directions: Press the small button and push it forward, micro usb will be ejected.