Kensington 72129 Pilot Mouse Optical Wireless 5-Button USB/PS2 Mouse (PC/Mac) DiamondEye optical technology responds to your fastest movements with accurate tracking and precise guidance Interference-free Quick RF wireless technology prevents annoying cursor hesitation to provide ultra-smooth movement and precise control Provides the convenience of 4 programmable mouse buttons and a scroll wheel to reduce repetitive tasks to a single click Backed by a five-year manufacturer's warranty and free technical support Ergonomically-designed shape that provides the ultimate comfort for right-handed users, with rubber fin grips