Product Specification : - Universal: Easily connect up to 6 compatible Logitech keyboards and computer mice to one laptop – without the hassle of multiple USB receivers, on Windowas as well as on Mac - Powerful, reliable, wireless connection: Connect up to 10 metres (33 feet) away with virtually no delays or dropouts between your cordless PC mouse, keyboard and computer - Unifying Receiver: You can leave the mini-receiver in your notebook, so there's no need to unplug it when you move around - Multi-Device: With your Unifying receiver plugged into your laptop or Macbook, use it with a wireless ergonomic verticle mouse or trackball in the office, and with your optical gaming mouse and keyboard at home Product Description : Plug it. Forget it. Add to it. The tiny Logitech Unifying receiver stays in your notebook, so there's no need to unplug it when you move around. It connects up to six Unifying devices to your computer so you can easily add a compatible mouse or keyboard – without the hassle of multiple USB receivers. Advanced 2.4 GHz wireless technology provides a powerful, reliable connection up to 10 metres (33 feet) away with virtually no delays or dropouts. System Requirement : Windows® 10 or later, Windows® 8, Windows® 7, Mac OS 10.10 or later Package Content : Unifying Receiver, User documentation