[. . . ] Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. [. . . ] Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Your new Wireless Battery Free optical mouse will offer you wireless freedom, yet no battery is ever needed. Whilst saving the cost of batteries, it assures wrist comfort, lightness, easy operation and no RF-interference. (For 1st time use or whenever the Battery Free Mouse is relocated to another computer. If your mouse cursor does not move, not moving smoothly, or when the PWR LED (red) blinks, press the "TUNE" button until the frequency has been adjusted for the best performance, repeat the process if needed. Place the mouse on the center of the mouse pad, and do not move the mouse. PWR LED turns "OFF" and the RUN LED light starts "Blinking". When the tuning process is complete, the PWR and RUN LED will return to their original mode. [. . . ] All the products and software mentioned above are registered trademarks of their respective owners. [. . . ]