The reliable wireless combo with the tiny Logitech Unifying< nano-receiver and carry around mouse.Advanced 2.4 GHz wirelessSo you can work or play in more places-like your comfy couch-the wireless connection virtually eliminates delays, dropouts and interference and gives you a range of up to 10 metersLogitech Unifying receiverThe tiny receiver stays in your laptop. Plus, you can easily add a compatible wireless mouse, keyboard or number pad-without the hassle of multiple USB receivers.