1. USB 3.1 data transmission spped is 5Gbps, allows you to read 2 memory cards and USB 3.1/2.0 simultaneously, supports a maximum of 128 Gb SD / TF card, super light weight and compact size for you to carry around. Fast download the files from your USB or SD cards to the mobile phone, pad, laptop, or computer, used for upload and share the photos and videos quickly with your 2. with SD, SDHC, SDXC, -SD, -SDHC, -SDXC cards. with USB-C devices like 2015/2016/2017, / Pro 2017, Pro, Pro 2017/2016, Galaxy S10 /S9/S8/S8 Plus / S9 Plus /Note 8/Note 9, / Pro,Chromebook /Pixelbook, Surface Book, Zenbook, XPS13/15, and more USB-C devices. 1 standard USB 3.1 port (backward with USB 2.0/ 1.1) for flash drive, U disk, hard drive, keyboard, mouse, printer etc 3. No need to download Apps, plug and play .You can quickly transfer FAT32 data files from your SD/TF card to the Type C devices, release the space of the anytime 4. USB C smart phones or other USB C devices must be support OTG function 5. Device with USB 2.0 would only run at 480Mbps. Make the form of your SD card is FAT32, if not, please backup the files on your SD card and it into FAT32, all the smartphone on the market can not recognize the files in NTFS specification: Name:3 in 1 Type C Card Reader OTG HUB Adapter Interface: USB/TF/SD Colour: white Material: ABS Size: 50 x 40 x 12.7mm Package Contents: 1 x Type- c converter Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.