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. Compatible with Linux, windows 2000, xp, vista, 7, 8, 10 and versions of these, mac os x 10.6 and above.