Micro-precision scroll wheel: Faster, easier web navigation plus advanced optical sensor for smooth tracking on more surfaces
Extended battery life: Go for up to three years without a battery change (Battery life may vary based on user and computing conditions)
Compact comfort in cool colors: Ergonomic shape, soft rubber grips and great style that's easy to take anywhere
Multi-device wireless receiver: Tiny Unifying receiver connects up to six Unifying-compatible devices
For Windows and
Mac computers: Works with Windows XP, Vista, 7 and Mac OS X 10.5 or later
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