- Off table and without limitation of operational space<br />- Ideal for laptop users<br />- Thumb-controlled trackball<br />- 4D page scrolling function can be controlled simply by your thumb<br />- Plug and play、 no software required<br />- Fit left and right handed users<br />- Compatible with Windows 95/ 98/ 2000/ ME/ XP/ NT<br />                                                                                                                                Dimensions: 2.99 in x 1.93 in x 1.85 in (7.6 cm x 4.9 cm x 4.7 cm)<br />Weight: 3.63 oz (103 g)