Penguin® Ambidextrous Vertical Mouse – Large Wireless - Vertical design encourages a more ergonomic position whilst mousing to avoid wrist strain - BioCote® Anti-bacterial protection keeps your Penguin® fresher and cleaner for longer - Wireless design to keep you tangle free - Easy-glide symmetrical base with precision laser and scroll wheel aids fast, accurate tracking and document scrolling - Central bow tie switch allows easy transition between right and left-handed use - Adjustable 400, 600, 800 or 1200 dpi settings - Encourages fast and precise operating movements