Ergonomic 6-button wireless mouse with 45° design: This vertical mouse encourages a more natural hand posture and relieves strain on the wrist – for relaxed, fatigue-free work Optimised for left-handed use: The MW 4500 LEFT was specially designed for left-handers and gives a pleasant feel thanks to an abrasion-resistant surface finish Wireless 2.4 GHz RF technology: Simple connection via Plug & Play with nano USB receiver. The dongle can be securely stowed away in the bottom of the mouse when transported. Precise sensor offers a 3-stage adjustable resolution (600/900/1200 dpi): Switch back and forth at the touch of a button and adjust this vertical mouse perfectly to your everyday needs Practical: Status LEDs show low battery status, 2 thumb keys can be individually assigned with CHERRY KEYS software, e.g. with copy and paste