A modern upgrade to the Free2, RollerMouse Free3 brings you the same ergonomic design, precision and quality with the added benefits of more speed, extra buttons and optional wireless technology. Natural feel for natural movement. RollerMouse Free3 features a new type of sensor located underneath the rollerbar, allowing for more precise cursor movements. It can accommodate multiples screens and combines flawlessly with laptops in office environments. RollerMouse Free3 fits seamlessly with our Balance Keyboard. Work at your own pace. RollerMouse Free3 offers greater accuracy and cursor speed selection than its predecessor. The ten speeds range from 600 to 2800 dpi, allowing the Free3 to move quicker and easier across multiple monitors or extra-large screens. RollerMouse Free3 features a new, advanced sensor located underneath the rollerbar, allowing for more precise cursor movements. Work at the speed that's right for you. Easy to use. RollerMouse Free3 sports more padding with its new built-in wrist rest for increased comfort. The fully open, more stable rollerbar allows for room to move and accommodates varying shoulder widths. It also has a sturdier aluminum base and a quieter click. New features for an updated feel. RollerMouse Free3 features two new buttons for forward and back in most Internet browsers, with a lower click volume to not disturb your workflow. At 0.9" high, the RollerMouse Free3 still boasts the lowest profile in the RollerMouse family, helping maintain a proper, ergonomic position. Its slim design fits perfectly with our Balance Keyboard. RollerMouse Free3 is ideal for users with varied hand sizes. RollerMouse Free3 Wireless comes with a dongle for wireless connectivity and a micro USB cable for charging. It may also be used as a wired unit with the cable plugged into your computer.