JINGHUA Z30 5-In-1 Docking Station Laptop USB2.0 Hub(Black)1. Interface: USB 2. 0 x 3 SD x 1 TF x 1 2. Cable length: 0. 2m 3. 5 port expansion, support for keyboard and mouse, hard disk, U disk, SD card, TF card, etc., say goodbye to repeated plugging and unplugging 4. No need to power supply, you can drive large capacity mobile hard disk and multi device connection 5. Three USB2. 0 high speed transmission, support for device document transmission, smooth and do not drop the line 6. With high performance