Empowered 2nd wheel5 Programmable ButtonsExtraordinary 5 Programmable Buttons instantly fulfills all your special needs, expedite and thoroughly utilize your computer usage time.5 Programmable Buttons3rd "Pan" Wheel ButtonSimply click on the 3rd wheel button and you can easily access the "Pan" function to overview your documents and images.3rd "Pan" Wheel Button800 CPI OpticalThe 800 CPI (Counts Per Inch) Optical Resolution delivers absolute precision and works on almost any surface with pinpoint accuracy.800 CPI OpticalErgonomic DesignRelax your busy clicking hand with this ergonomic thumb resting design.Ergonomic DesignRechargeable ReceiverA4 Tech's Exclusive Rechargeable Receiver not only distributes a secure and reliable connection, but also supplies endless battery life with built-in Battery Charger and free rechargeable batteries. Simply exchange the battery when the power is low!Rechargeable ReceiverPower On/Off SwitchPower On/Off switch prolong battery life and save energy. With this innovative power saving switch, using wireless mouse is enjoyable. Most welcomed by frequent travelers and excess computer users.Power On/Off SwitchSecure RF TechnologyThis advanced Wireless Technology ranges up to 2 meters with no angle restriction. The reliable dual channels and A4 Tech exclusive 255 User ID Codes allows many A4 Tech wireless mice to function flawlessly within a secure wireless environment without interfering each other.Secure RF TechnologyNoiseless Comfort WheelA4 Tech's Exclusive Patented Quiet Scrolling Wheels bring its user(s) comfort and smooth computing experience.Noiseless Comfort WheeliWheelZoom SoftwareA4Tech iZoomWheel software let its users easily access hundreds various zoom-supported applications for instantaneous response, accuracy, and reliability. Finally, a professional designer meets its perfect companion.iWheelZoom Software Instruction on How to download and install the driver properly:1.) Press Download button to download the desire driver.2.) Save it some where you will remember after downloaded. Recommend save on desktop so it is easily find.3.)After succInstructions on How to download and install the driver properly:1.) Press Download button to download the desired driver.2.) Save it somewhere where you will remember after download. We recommend that you save it on your desktop, so it will be easy to find.3.) After successfully downloading the driver, do not open the driver file until you make sure the following has completed: ***REMOVE / UNINSTALL any original mouse driver from the PC. (If you forgot to do this part, your driver may not be able to install correctly and successfully later)4.) After the original mouse driver has been removed, open the downloaded file.5.) Follow the on-screen instructions.6.) When it's successfully installed, please restart your computer.7.) After you have restarted the computer, you will see on the bottom right corner of the taskbar a mouse icon. This means you have installed the driver successfully.essfully downloaded the driver, do not open the driver file until you make sure the following has completed:***REMOVE / UNINSTANLL any original mouse driver from the PC. (If you forgot to do this part, your driver may not be able to install correctly and successfully later)4.) After the original mouse driver has been removed, open the downloaded file5.) Follow on-screen instruction6.) When it's successfully installed, please restart your computer7.) After you have restart the computer, you will see on the bottom right corner of the tastbar a mouse icon. This means you have installed the driver successfully. It is highly recommended to always use the most recent driver version available.Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games.Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.