For fingers with a total span of 2.75" or wider. Refer to Sizing Tab. The DXT wired mouse is a compact ergonomic mouse which has been expertly designed by a team of leading UK physiotherapists and ergonomists. The DXT promotes a neutral (more vertical) wrist posture while allowing the hand to work with a light touch fingertip hold providing precision cursor control. It is the only compact right and left handed ergonomic mouse designed to use the precision movements of the hand. Ergonomic relaxed neutral wrist and hand position The design of the DXT enables the hand to work from a relaxed position reducing the tension on the soft tissues. Precision grip for accurate navigation Unlike other vertical mice, the DXT is grasped like a pen in the "precision" grip which engages the small muscles and joints of the fingers (as opposed to large muscle groups of the shoulder). These smaller muscles are ideal for mousing because they are better adapted for finer, precise movements. Instantly switches between right and left hand Switches between right and left handed use with the tap of a button (no changes to button-assignments in the operating system are required). This unique feature allows mouse-sensitive users to distribute usage between both hands to spread the workload thus maximizing comfort and productivity. Compact design fits a large range of hand sizes Because you hold the DXT in your finger tips, it's 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 Tab to determine which model is appropriate for your hand size. Great for travel Unlike other, more bulky, ergonomic mice the DXT is ideal for laptop and travel use. 4 DPI levels to choose from: 800 | 1200 | 1600 | 2400 Zinc base for improved stability and accuracy | 
