Product description Color: black Product features: classic / high-end design, mobile phone stand No external power required, data transfer from hard drive to hard drive, Supports hot-swappable, low Power consumption, the product is suitable for U disk, card reader, USB mouse, USB keyboard, scanner, digital camera, digital video camera, USB sound card, hard disk box and other devices, etc. Suitable for desktop computers and notebooks , supports hot swapping, low power consumption, and can read portable devices Operating system: Windows 98SE / ME / 2000 / XP / WIN7, Macintosh OS 9.0 or above 1. Convenient and portable - USB 3.0- 4-port hub. The compact design allows it to be transported anywhere Plug and Play - Simple yet functional. Connect your peripherals: mouse, keyboard, USB stick, hard drive and more. High-speed data transmission and connections. 2. Small Design- Easily store the cable in the built-in storage, ideal for traveling. Minimize the risk of scratching other devices. 3. Backward Compatible - Supports transfer speeds up to 5Gbps (USB 3.0), 480Mbps (USB 2.0), 12Mbps (USB 1.1 ). 4. With Cell Phone StandIt is also a cell phone stand for you to follow drama after work, relax your mood, easy to use and easy to carry.