Thank you very much for viewing! This is a multi-card reader that allows you to transfer photos to an SD card, etc., without the need for an app. I opened it and looked at the instruction manual, but it has been stored at home without being used. I will sell it to someone who understands. - Model: 4in1 Card Reader - Brand: STAR FOCUS - Function: SD card, microSD card reading - Usage: Data transfer, file management STAR FOCUS