This is the Logitech Wireless Mouse Travel 3-Button Black 800DPI [LGT-M187B] The pocket-size mouse that you can count on thanks to its extra-small design, reliable connection and wireless nano receiver. The Mini Mouse is so small itll easily fit in your purse, handbag or pant pocket for extra-portability. Say good-bye to cords and enjoy wireless freedom (up to 10 meters (or 33 feet)), so its easy to use your mouse on the couch with your laptop”or even when youre hooking your laptop up to your TV. The nano receiver is so small it stays in your USB port”without worry of losing or breaking it. If you do need to remove it, it stores inside the mouse. Youll enjoy the freedom of wireless with more precision and control than your laptops touchpad. You get the high quality and reliability that have made Logitech the global leader for mice”plus a three-year limited hardware warranty.