Bidirectional Transfer: This card reader can transfer photos, videos and other files from the memory card to laptops and Type C phones with OTG function. The data can also be transferred to the memory card via the card reader. Support for iPad Pro 2018, but can only read photos and videos recorded by the digital camera on the memory card, only transfer them from the memory card to the iPad Pro, not the other way around (one-way transfer) Supported devices: Laptops with USB-C interfaces (such as New MacBook, MacBook Pro, Google Chromebook Pixel) and phones with Type-C interface and OTG functions. Supported Card Types: The card reader has 3 card slots that can read SD cards, TF cards and CF cards. Wi-Fi SD card is not supported. Cards in exFAT format cannot be read, please format them in FAT32 or FAT format. This card reader does not support reading multiple cards at the same time and can only read one card at a time. Reading Speed: The card reader meets the USB 2.0 transfer speed and the speed is 14MB /s ~ 16MB /s. Plug & Play: No driver required, plug in and off you go. Hot swap support. Compatible devices (partial list): Apple MacBook 12 ", MacBook Pro 13" / 15 ", iMac, iMac Pro Dell XPS 12/13/15, Alienware 13/15/17, Inspiron 13/15/17 Microsoft Surface Book 2, Surface Go Samsung Galaxy S9 / S9 + / S8 / S8 + / Note 8 / Tab S3 / TabPro 12, Galaxy Book OnePlus 6/5 / 5T / 3 / 3T Google Chromebook Pixel (2015), Pixel C, Pixel, Pixel XL, Pixel 2, Pixel 2XL, PixelBook, Nexus 5x / 6p Lenovo Yoga 900/910/920, ThinkPad X1 Huawei P20 / P20 Pro / P10 / P10 + / P9 / P9 + / Mate 10 Pro / MateBook LG G5 / G6 / V20 / V30, Sony Xperia X Compact / XZ Premium / XZ HP Specter x2 / x360, Acer Aspire R 14, ASUS ZenBook 3 More USB-C or Thunderbolt 3 laptops and OTG supported USB-C phones and tablets Specifications: Dimensions: 60.5 x 55 x 14 mm Weight: 52.1 g Cable length: 100 mm Speed: USB 3.1, up to 5.0 Gb / s data transfer speed. * Depending on the card rate Compatible card: CF: CF I (43 x 36 x 3.3 mm), not for CF II (43 x 36 x 4.3 mm). SD: Supports UHS-I (SD, SDXC, SDHC, RS-MMC, MMC Micro). TF: Supports UHS-I (Micro SD, Micro SDHC, Micro SDXC) Caution: Memory cards are not included in the scope of delivery. This card reader is not compatible with CF II (43 x 36 x 4.3 mm). The data transfer rates depend on the speed of the memory card. Before connecting to your device, insert the memory card into the reader.