4 In-1 Multi-Interface -- The Memory Card Reader has various interfaces, USB/USB C/Micro USB/SD card slot/Micro SD card slot, Easily transfer the file you need between different devices. Card Reading -- 4-In-1 SD card reader adds a charging port, Charging and card reading can be operated at the same time, Easy and convenient. Compatibility -- The SD card reader support all smartphones other devices with USB port, Maximum support memory card capacity 400Gb real-time sharing and data. Small And Portable -- The slim and sleek design + Key chain design allows the SD card reader to be placed into your pocket, prevent loss and carry it with you. Management -- High speed two-way transmission, The mobile phones SD card reader suitable for data transmission between all smartphones and other devices, Providing intelligent file viewing and management functions, Browsing documents, Pictures, Watching videos, Listening to Music, Etc.