3M Renaissance Mouse features a unique "handshake" design that helps reduce muscle strain and discomfort. Relieves pressure on the median nerve. Keeps your arm in a neutral position for comfortable mousing. It works by tranferring most muscle use from the hand and wrist to the larger muscles of the upper arm, reducing muscle load without sacrificing speed or accuracy. Designed for right-handed users. Top button operated by thumb for left and right clicks. Fully programmable third button. Choose between USB (with PS/2 adapter) and optical models. Sizing: Measure width of hand at the knuckles: Small/Medium: 2-3/4" to 3-1/2"
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