1. Applicable to USB interface equipment 2. One thing with multiple functions, 4 devices can be connected at the same time 3. The USB interface can be connected to a projector, keyboard, mouse, U disk, etc. to improve office/entertainment/learning efficiency 4. Support USB high-speed transmission 5. Multiple protections, safer to use 6. Support Windows XP/Vista/7/8/10, Mac OS, Linux system 7. Plug and play
