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/Micro SD/USB disk to smartphone Import photos from SD / TF card to iPhone / iPad equipped with digital camera Support external keyboard/Hub/Ethernet adapter/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 "Not compatible with this accessory" appears in iProducts, please make sure it is properly connected. If the iPhone / 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 / 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 / Micro SD / 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.