Multi-function USB 3.0 Hub & Memory Card Reader: 1 USB 3.0 port + 1 USB 2.0 port + 1 TF/Micro SD card slot + 1 Micro USB port + 1 SD card slot

Save Your Time Remarkably: High speed transmission USB 3.0 HUB with USB 2.0 memory card reader combo

Allow you keep a Micro SD card/TF card or SD card in the card reader

The micro USB input allows for a micro USB power supply to be plugged in for extra power for those heavy powered peripheral devices, such as external hard drives

USB 3.0 high-speed transmission, backward compatible with USB2.0/1.1/1.03

Plug and play, support hot swapping

Note: If your device is Surface Pro 3 10.8 inch, it can't be charged at the same time when using.