[312MB/s for 3× Faster] With this SD4.0 card reader adapter you could enjoy a 312MB/s read and write speed rather than 104MB/s with a SD3.0 card reader; Dockteck USB 3.1 memory card reader with 5G transfer will help you transfer 1G files in seconds and save more time for you ( USB 3.1 backwards compatible with USB 3.0 USB 2.0 and USB 1.1).Note: this item is a card reader, package not include memory card [Support OTG for Plug& Play] Just connect Dockteck SD card reader which support OTG( On-the- Go) function directly to external devices without any medium to your devices you will enjoy a real time data transfer, output operations, or charging functions; Just Plug and Play! [3 Slots for More Convenience] Dockteck 3 in 1 usb card reader works SD& TF slots at the same time, both slot up to 312MB/s. Support UHS-Ⅱ-Ⅰ SDXC, SDHC, SD（V90, V60, V30, V10）, MMC, RS-MMC, Micro SDXC, Micro SD(V60, V30, V10) and Micro SDHC cards from Camera/ Gopro/ Dash Cam/ Surveillance camera and USB A external device connected [Ideal Companion for Camera] Dockteck Card Reader for camera memory card with 5.9 inch cable makes it easy to store in your camera bag or backpack, make it convenience for you to check and share your real time pictures or videos, 3-slot provides convenient access to SD/ micro SD cards and a 2.0 USB A with OTG function for output operations when needed [Wide Compatibility] Dockteck 3 in 1 memory card reader works forUSB-C / A devices like iPhone16 15 Pro/Pro Max, MacBook Pro (2023~2016), MacBook (2022~2015), iMac Pro (iMac), Acer Aspire Switch 12S/R13, Predator 15/17X, XPS 13/15/17, Alienware 13/15/17, Spectre x360, Microsoft Surface Pro, Book 2, Razer Blade 15/Stealth 13/Pro 17, Samsung Galaxy Tab Pro, S23/ S22 Ultra/ S21/ S20...

Product features:

Product performance：

USB3.1 type C to SD4.0/ TF/ USB A 2.0 card reader with 5.9 inch cable

Upstream:

USB3.1 type C (5G)

Downstream:

TF/SD4.0 UHS-Ⅱ(312MB/s)

USB 2.0-A Femal(480MB)

1.Dockteck 3 in 1 memory card reader USB 3.1 could reach a high transfer speed of 5 Gbps to transfer your 1G files in seconds

2.SD Micro SD/ TF card reader works with OTG functional devices

3.Simultaneous Access with 3 Slot, both SD/ micro slot up to 312MB/s. S upport UHS-Ⅱ-Ⅰ SDXC, SDHC, SD （V90, V60, V30, V10）, MMC, RS-MMC, Micro SDXC, Micro SD (V60, V30, V10)  while an  2.0 USB A with OTG function for o utput operations when needed

Product appearance：

Material: Aluminum alloy

Color: gray

Cable length:5.9 inch

SD slot: max 312MB/s

TF slot: max 312MB/s

USB A slot: USB 2.0 with OTG function