I haven't had much chance to use this since I bought it, so it's been stored away. There are some minor scratches, so please understand that this is a used item. The following is the manufacturer's description: Equipped with 1 SD card reader, 1 micro SD card reader, and 3 USB 3.0 ports, the Atolla hub can meet various needs, allowing simultaneous use of USB peripherals such as USB memory sticks, keyboards, mice, and hard drives. 【Super-Speed USB 3.0 Ports】The USB 3.0 ports on the card reader support a maximum data transfer speed of 5Gbps (theoretical value), which is 10 times faster than USB 2.0 (480Mbps). HD videos and large files can be transferred in seconds. SD card reader, USB 2.0, USB 1.1, and USB 1.0 are backward compatible. Note: The transfer speed of the USB 3.0 port varies depending on the USB of the external device. If the external device's port is USB 3.0, the transfer speed can reach 5Gbps (theoretical value). If the external device is USB 2.0, the maximum speed will be 480Mbps. 【High-Speed Card Reader Transmission】The Type-C hub card reader has an SD card reader and a micro SD card reader, and music, videos, photos, and files from SDXC / SDHC / SD / Extreme III SD / Ultra II SD / MMC / RS-MMC / MMCmobile / miniSD / Micro SD / TF / Micro SDXC / Micro SDHC are transferred to the computer at high speed. Also, there is no need to configure anything; just connect it to the Type-C port of your PC or smartphone. 【Highly Compatible Type-C SD Card Reader】The USB C Hub SD card reader is highly compatible and supports all computers equipped with a USBC port. For example: Windows XP / Vista / 7 / 8 / 8.1 / 10, Mac OS, iPadOS, iOS, Linux, or other operating systems can be plug-and-play. 【High-Quality Aluminum Alloy Material】Quality Assurance: The USB C Hub SD card reader uses aluminum alloy material, achieving high-speed and stable signal transmission, corrosion resistance, wear resistance, excellent heat dissipation, and can be used for a long time.