- For connecting up to 4 USB devices (e.g. a mouse, keyboard, printer, USB memory stick) to a USB port ,- Topside socket allows you to plug USB devices in on the top for added simplicity and convenience ,- Bus powered, i.e. power supply via the USB socket of a PC/notebook ,- Integrated USB cable for connection with a PC/notebook ,- Suitable and tested for USB 2.0, downward compatible with USB 1.1 , ,System Requirements: ,- Operating system: Windows 10/8/7/Vista/XP and Mac OS 10.x - Connection Cable: Integrated ,- Number of USB Ports: 4 Ports ,- USB Standard: USB 2.0 ,- Model: Bus Powered ,- OTG Capable: No ,- Colour: Blue 2 years legal warranty only