Interchangeable Grips: The Newtral 2 mouse comes with Precision Grip, balance Grip, and Ergo-Grip for a fit and feel that's best for the way you work and play. 1, Precision Grip gives you utmost in fingertip control, best for computer drawing,gaming etc.; 2, The Balance Grip takes care of the balance between precise positioning and comfort;3, The Ergo-Grip offers maximum ergonomic comfort,best for office usage. There is no sacrificing of work efficiency when enjoying the ergonomic comfort of the Newtral mouse. Soft Gel: We apply soft silicone gel on the large flange for the Ergo-Grip offering extra comfor for your wrist and palm. Comfortable Grip Design: The concave depression on the thumb side of the mouse combined with the downward slope towards the mouse towards the fifth finger positions the hand at a 33 degree; angle off the horizontal, which is a more natural position for your wrist and forearm. Neutral Shape: The horizontal semi-fist shape just fit your hand at relaxed position like resting on the mouse instead of holding. Easy Mouse Lifting: Detailed design allowing easy lifting whenever you want for Precision Grip and Balance Grip. 2 Sizes for the Best Fit: One size cannot fit all. Good ergonomic mice always allow you to choose the right size. Easy to Use, No Learning Curve: Plug and Play, Easy to adapt. DPI Adjustable: Choose the right speed you prefer. 6 Button Output & Programmable for wired version: You can program the function of all 6 buttons to the the way you like for wired version. Gold-plated USB Connection: Good quality to make sure you are always connected.