A different kind of comfort. A different kind of control. All-day comfort - Work in comfort with a stable, sculpted trackball that supports your hand and lets you rest your arm. Small wonder - Logitech Unifying receiver-the tiny, wireless receiver that stays in your laptop and lets you add compatible devices as you need them. Super powered - With up to 18 months of use from a single AA, you might just forget your trackball uses batteries at all.
Logitech Unifying receiver
1 x AA battery
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