Function: 1 USB 2.0 Shared Switch is a great solution for sharing USB devices (such as USB). 2. Printer, scanner, external drive, or other USB devices with 4 computers (4 computers share a set of keyboard and mouse) 3 Connect this USB device with a button to switch between 4 computers freely. 4 All metal shell protects circuit board while reducing external signal interference. 5 Made of metal material, high speed heat dissipation, high safety and strong stability. Specifications: Item Type: USB Switchera> UP Input: 2 x USB ports (or 4 ports) Connect to the USB on the host computer. Input: 4 x USB; Connect keyboard, mouse, scanner, printer, U disk, etc. Supports speeds of up to 480Mbps Backwards compatible with USB 2.0 /1.1 devices Support XP / 7/8/10 / Vista / Android / OSX8.6 or later Application scenario: Computer, Smart TV, Phone, DVR, etc. Plug and play, no drivers needed. Source: Button Package List: 1 x Switch 1 x User Manual 1 x Foam Sticker 4 x Cable 1 x Connection Line