Penclic R2 Wireless Ergonomic Computer Mouse with 5 Programmable Buttons and Scroll wheel, Adjustable DPI Settings, PC or Mac The Penclic Mouse is the ergonomic computer mouse that feels and moves like a pen The pen grip provides a relaxed working position to help secure strength and increase productivity Wireless operation via a Nano to USB receiver Penclic has five buttons and scroll wheel Operates on almost any surface without any pad or tablet Counteracts static tension in your arms and shoulder area