Two-way transfer : The SD Card Reader for iPhone supports two-way transfer,from SD card to iPhone or iPhone to SD memory cards.It's easy to download photos or videos from SD cards directly to the iPhone or ipad, and share them with friends and family members at all times.It isnt suitable for iPads with usb c charging ports High Speed Transmission: The speed of data transmission is very fast.The memory sd card reader can transmit photos and videos of your camera to your iphone or ipad in a few seconds, saving a lot of time. Plug and Play: The SD Card Reader does not require third-party apps and just use the iOS built-in Files app.Please wait for 5 seconds after connecting the device. Raw Files Support: The SD Card Reader supports standard photo formats including JPEG, RAW, and 4K video formats including H.264 and MPEG-4.The card reader supports the memory card with a maximum capacity of 512GB.