Kensington 72216 PilotMouse Wireless Optical USB/PS2 Mouse (PC/Mac) DiamondEye optical technology responds to your fastest movements with accurate tracking and precise guidance on virtually any surface Interference-free Quick RF wireless technology prevents annoying cursor hesitation to provide ultra-smooth movement and precise control Works right out of the box on both PCs with an open USB or PS/2 port and Macs with an open USB port Backed by a five-year manufacturer's warranty and free technical support Ergonomically-designed shape with flexible rubber grips that provides maximum comfort