This is the Logitech Wireless Combo MK270 [LGT-MK270-US]<br /> <br />The reliable wireless combo with the tiny Logitech Unifying nano-receiver. You get the reliability of a cord plus wireless convenience for up to 10 metres - thanks to Logitech Advanced 2.4 GHz wireless - even in the busiest environments. And the mouse features the tiny Logitech Unifying receiver, so you can take your mouse wherever you go. <br /><br />* Wireless range may vary due to environmental and computing conditions. ...Contact us if you need more help.<br>