Multiple ports: 1 SD card port, 1 TF card port, 3 USB ports, 1 lightning 8pin charging port Transfer photos and videos from SD card or Micro SD or USB disk to smartphone Import photos from SD or TF card to iPhone or iPad equipped with digital camera Support external keyboard or Hub or Ethernet adapter or MIDI interfaces etc high current devices Charging during transmission, supports 2A charging current No need APP, just plug and play Support iOS 13 Note: If andquot Not compatible with this accessoryandquot appears in iProducts, please make sure it is properly connected. If the iPhone or iPad case is too thick, please take it out and try again This adapter is not compatible with USB devices when the current exceeds a certain range. If the photos and videos are not taken with the camera, but downloaded by other means, the image or video must be placed in a file named dcim, the image must be called IMG_0000 (or IMG_0001, IMG_0002, etc.), and the video must be MVI_0000 (or MVI_0001, MVI_0002, etc.). For SD or Micro SD or USB, please use only one of them. This is one-way transfer, this reader can only help you download photos taken by a digital camera.