1. USB 3.1 data mission 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 storage or SD cards to the mobile phone, pad, laptop, or computer, used for upload and share the photos and videos quickly with your friends 2. Compatible with SD, SDHC, SDXC, Micro-SD, Micro-SDHC, Micro-SDXC cards. Compatible with USB-C devices like MacBook 2015/2016/2017, iMac/iMac Pro 2017, iPad Pro, MacBook Pro 2017/2016, Samsung Galaxy S10 /S9/S8/S8 Plus / S9 Plus /Note 8/Note 9, Huawei P20/P20 Pro,Chromebook /Pixelbook, Surface Book, Asus Zenbook, Dell XPS13/15, and more USB-C devices. 1 standard USB 3.1 port (backward compatible 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 fer FAT32 format data files from your SD/TF card to the compatible Type C devices, release the space of the storage 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 sure the form of your SD card is FAT32, if not, please backup the files on your SD card and format 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 shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.