3-Port USB Hub with SD/TF Card Reader. Connect your USB drives, SD/TF Card, peripherals and more.Memory cards need to be read seperately. Expand USB Ports on your PC or Ultrabook Designed especially for PCs,laptops, tablets, and ultrabooks and expands one USB 3.0 high-speed port into 3 easily. With the external power source, it can get more drives to work together! Super Speed on Data Transfer Support super faster data transfer up to 5Gbps-10X faster than USB 2.0, transfer HD movies or files in just seconds. Multi-function High Speed Card Reader Features SD and TF card slots, which makes reading different types of memory cards very convenient, and the use of USB 3.0 allows for the fast reading of large media files, meeting the needs of those who need their files in HD. Portable and Safe Design The handy and compact design offers an ideal way to fast access to your USB devices anywhere. Built-in Overvoltage / Overcurrent / Leakage and Short-Circuit protection unit to protect you&your family! System Requirements Compatible with Windows XP/Vista/7/8/10, Mac OS and Linux system and othe usb supported devices.Moreover, it also support SD/TF Card Reading. Power Usage For a stable connection, avoid connecting high power-consumption devices, such as external hard drives. The hub will sync but not charge tablets and other devices that require a higher power input. The maximum current of a single USB port can be 900mA. Please plug in the power source of your external HDD if the HDD requires higher power.