1. For downloading to mobile phones with memory cards.
2. Mobile phone memory cards are divided into three types: large cards, medium cards and small cards. When you buy a mobile phone, you should also bring you a card tray, which is a device that connects the memory card and the card reader.
3.Plug the card reader into the USB port of the computer, and then the computer will display, you can insert the memory card again
Product Name: Whistle Reader
Product material: plastic
Product size: 3*1.5*0.5CM
Product weight: 2 grams
Support card reading type: MICRO SD /T-FLASH/TF
Card reader x1