[. . . ] Remove the battery cover from the top of the mouse by using the notch on the back. [. . . ] The accompanying micro USB receiver is small enough to leave plugged into your computer or simply store it inside the mouse when travelling. The advance scroll wheel feature program can be downloaded from the Targus website. Remove the battery safety clip by squeezing the center of the clip and sliding it back, towards the rear of the mouse. Replace the battery safety clip by sliding it forward until it clicks into place and then replace the battery cover. Power Saving mode: After an extended period of time, if the mouse is not used, it will automatically enter power saving mode to conserve power and increase battery life. 3 LEDs lit 2 LEDs lit 1 LED lit Full power Half power Low power To access the advanced scroll wheel features you will need to download and install the software driver. Once installation is complete, open the driver software and select the desired setting for the scroll-wheel button. To extend the life of your battery, turn off the mouse while travelling or when you're not using it. [. . . ] To extend the life of your battery, turn off the mouse while travelling or when you're not using it. [. . . ]