Precise surface enhances the precision of optical mice at fast speeds. Battery saving design extends battery life of wireless mice up to 50%. 3Ms gel technology creates a wrist rest that is firm enough to provide the support you need, but soft enough for optimal comfort. Leatherette cover feature antimicrobial product protection which inhibits the growth of microorganisms, such as bacteria, on the product surface, that can cause stains, odors and product degradation. 8.6" x 6.8", black with Vertex design. 3M Part Number MW309LE.