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The two extra thumb buttons put extra control right where you need it, so it's simpler and faster to get things done.Dual-Axis wheel is optimized for smooth vertical scrolling while offering more power and control than a traditional scroll wheel
Includes plug-and-forget pico receiver with Unifying technology. Just 3 mm long, our smallest-ever wireless receiver. It's ideal for portable computers like laptops and Ultrabook devices
With up to 18 months of battery life from a single AA, you can almost forget about changing batteries. Smart sleep mode and an On/Off switch save power, while an indicator light eliminates surprises.