TRIXES In-USB OTG USB A to Micro USB Adapter for Raspberry Pi Zero, Smartphones, & Tablets Slot inside the device's USB A plug to transform it into Micro USB Plug-and-play, no additional cables, sits flush inside the USB plug Connect flash and external hard drives for file transfer Connect game controllers, mice, and keyboards for extra control Compatible with the Raspberry Pi Zero. Make sure your Smartphone or Tablet supports OTG