–All J-Tech Digital products include a one-year manufacturer replacement warranty and free lifetime technical support from our customer support team located in Stafford, TX. Support is available from 9AM – 6PM CST, Mon – Fri. Contact information available on our seller page. –Reduce the clutter on the desk with the V728’s wireless functionality. Simply plug the included USB dongle into the computer and enjoy using the mouse. Requires 1 x AA battery (included). –Experience precise cursor movement and always remain in control! The smooth trackball functionality allows you to move the cursor around with extreme accuracy and control. –Toggle between 800/1200/1600/2400 DPI and adjust the sensitivity of the mouse according to your preference. / –Reduce the strain on your wrist by moving the cursor smoothly via the trackball instead of moving your wrist and arm.