This small eco housing allows to connect multiple USB devices, and has a slot for memory cards. I use a mini USB keyboard, a USB key and a 64GB memory card, completing my Nexus 7 tablet does not have a memory card slot. A USB 5V supply allows the use of hard drives or other USB devices that require more than 500mA. Small and discreet, this device gives me all 'satisfaction, immediately recognized by Android.