Kensington 72114 Pocket USB Mouse (PC/Mac) DiamondEye optical technology responds to your fastest movements with accurate tracking on virtually any surface USB connection for universal plug-and-play installation with both PCs and Macs Comes with a travel bag that eliminates the problem of tangled cords Backed by a one-year manufacturer's warranty Two buttons and a scroll wheel, in a compact shape that is comfortable for both right- and left-handed use