Penguin Ambidextrous Vertical Mouse - Wireless, Medium Vertical design encourages a more ergonomic position to prevent wrist pain Antimicrobial BioCote protection inhibits growth of bacteria and keeps your Penguin fresher for longer Precision performance laser, easy-glide symmetrical base and scroll wheel for accurate and fast scrolling Easily transition between right and left-handed use with the bow tie switch Adjustable dpi settings: 400, 600, 800 or 1200 dpi - for quick and precise working Compatible with Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10, Windows 2000 (supports all versions), Mac OS X (and later), Linux Wireless connection for a tidy workplace Please note: Li-ion polymer battery pack built into the mouse (3.7 V, 500 mAh, 1.85 Wh).