Logitech® Usb Unifying Receiver, Black

The tiny unifying receiver stays in your computer so your wireless mouse is always connected and ready to use. It connects up to six unifying devices to your computer, so you can easily add a compatible mouse or keyboard without sacrificing precious USB ports.

• Connects up to six unifying compatible mice and keyboards to each computer, so you don't sacrifice extra USB ports.
• Tiny receiver stays in your computer so your mouse is always connected and ready to use.
• Advanced 2.4 GHz wireless technology for a powerful, reliable connection free of delays and dropouts.
• Up to 33 ft. (10 meters) wireless range.