ERGONOMIC VERTICAL MOUSE: Designed by leading physiotherapists in the UK, the DXT was engineered to promote a neutral, more vertical wrist posture while allowing the hand to work with a light touch fingertip hold providing precision cursor control. CONVENIENT AND RELIABLE WIRELESS CONNECTION: Connect the compact RF dongle to an available USB port on your computer for quick and easy pairing. FINGER TIP GRIP INCREASES PRECISION: Because you hold the DXT in your finger tips, its comfortable for a wide range of hand sizes. However, the DXT 3 is approximately 15% larger than the DXT 2. Please refer to the Sizing Chart to determine which model is appropriate for your hand size. IDEAL FOR RIGHT AND LEFT HANDERS: Switch instantly between right and left handed use with the tap of a button. No changes to button-assignments in the operating system are required. AMAZING BATTERY LIFE AND CHARGING PERFORMANCE: The integrated, rechargeable lithium-ion is engineered to last for 1 month on a f