Features: Expansion of multiple USBDs Efficient office Supports simultaneous connection of multiple devices such as keyboards, mice, USB flash disks and removable hard disks Fast speed transmission Large files fast This USB port is 3.0 standard, measured 300MB/S transmission speed, picture files easily transferred fast. Turn your cellphone into a computer fast connect the keyboard and mouse, easy and comfortable typing. 4ports for keyboard and mouse, usb disk, card reader hard disk and other devices to use at the same time. For Digital Enthusiasts: Photographers, video editors and other people who require data transfer speed and stability. for Users who have multiple USB devices that use the same time. Specifications: Size:about 109x24mm/4.29x0.94in Component:Metal Port： 1xUSB3.0+3USB2.0 Transmission Speed：300MB/S Cable Length：about 8.50cm/3.35in 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.