Features: Five-port expansion interfaces is no longer scarce Support keyboard and mouse, hard disk, disk, card slots；Say goodbye to repeated plugging and unplugging. No power supply Large-capacity hard disk easy to read without power supply, you can drive large-capacity mobile hard disk and multi-device connections Three USB2.0 document transmission refuses to drop three USB2.0 fast speed transmission, support device document transmission smoothly. Sensitive response Keyboard and mouse connection fast and sensitive With highly performances chip, keyboard and mouse commands faster feedback. Not require river support for win7/8/10 and other mainstream operating systems. Specifications: Size:about 85x20mm/3.35x0.79in Component: Plastic Port: 1xTF,1xSD,3xUSB2.0 Package Includes: 1PC USB Adapter note: Due to the problem of lighting effects there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.