SIIG's Ultra Mini Retractable USB Optical Mouse - Black provides smooth and precise navigation without the hassle of tangled wire. It features 3-button with scrolling wheel to offer fast navigation for web browsing and general operations. Retractable USB cable design eliminates cable clutter and is ideal for travel. Ultra-mini palm size footprint is light and easy to carry. This mini USB retractable optical mouse works on most surfaces and is a reliable tool at an affordable price.