Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape
Description (ebay): Wirelessly connects to the included Logitech Unifying receiver, which plugs in to your computer's USB port. Optical technology; sculpted shape; scroll wheel; 4 buttons; wireless ...
Features: Stop chasing a mouse around. Your trackball stays in one place and puts control under your thumb, so you don't have to move your arm ...
Warranty: 1 year manufacturer warranty
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