Small and Portable:The slim and sleek design + keychain design allows the sd card reader to be placed into your pocket.When you are traveling outdoors or exploring, the keychain can prevent the memory card reader from being lost. And carry it with you. Compatibility:The sd/micro sd card reader support all iPhone with iOS 8.0 and up and iPads with iOS 8.0 or later/OTG Android phone/computer and other devices with usb port,Maximum support memory card capacity 512GB.(the package does not include sd card and micro sd card). Real-Time Sharing and Data Management:High-speed two-way transmission allows you to save a lot of waiting time. micro sd card reader provides intelligent file viewing and management functions, allowing you to easily manage data between iPhone /ipad/ Android / computer and other devices. With Charging Port : the sd card reader adds a charging port to its design. When you use an SD card adapter to charge your iphone/ipad devices, You can enjoy charging while transferring file data. No longer worry about power shortage. 4 in-1 SD Card Reader:The memory card reader has various interfaces,usb / usb c(type c)/micro usb/sd card slot/micro sd card slot and iOS devices charging port for iPhone/iPad,which allows you to easily transfer the required files between different devices.