Micro SD Card Slot: The sd card reader compatible with micro sd memory card, support all i - Phone with i - OS 9.2 and up and i - Pads with i - OS 8.0 or later. It’s easily download photos or videos from SD cards directly to the i - Phone or ipad, and share videos or photos with friends and relatives anytime and anywhere. - High Speed Data Transmission: The sd card reader for iphone data transmission speed can reach 20MB/S~30MB/S, the memory sd card reader for iphone can transmit photos and videos of your camera to your device in a few seconds, saving a lot of time. - Plug and Play: You don’t need a computer as a medium or install any applications when you use the memory card reader. For i - OS please use Files App to access the additional storage with name “Untitled”. Please wait for 5 seconds after connecting the device. Note: 1. When used on phones or tablets that supports OTG, the memory card file format should be FAT32/EXFAT, since NTFS is NOT supported by most of phones or tablets.2. Compared to the plastic case, the aluminum case is better for heat dissipation. The heat of Electronic components and circuitry will be conducted outside more quickly.