Kensington 64213 Expert Pro Mouse (PC/Mac) Six DirectLaunch buttons provide instant one-touch access to favorite Internet sites or applications Symmetrical design makes it easy and comfortable to use with either hand Constructed with stainless-steel bearings that provide smooth, precise tracking and maximum durability Backed by a five-year manufacturer's warranty and free technical support Includes 6 DirectLaunch buttons, 4 programmable mouse buttons, and an integrated scroll wheel