Compatible with select Unifying Logitech products One receiver - 6 devices: Connect up to 6 compatible keyboards and mice to one computer with a single Unifying receiver - and forget the hassle of multiple USB receivers. A USB receiver that's sotiny you can leave it plugged into your notebook all the time. Advanced 2.4 GHz wireless technology provides a powerful, reliable connection up to 10 meters away with virtually no delays or dropouts. Use this stand-alone USB Unifying receiver to replace a lost one. It's compatible with all Logitech Unifying products (look for Unifying logo displayed on compatible products) Additional receiver for Logitech Easy Switch products: Use an extra Unifying receiver to connect a dual connectivity mouse or keyboard - or both - to a second computer. Then switch from one computer to the other with the push of a button for efficient multi-tasking. It can also be a great add on for your Logitech Flow setup.