Enjoy comfortable computing with the portable HP X4000 Wireless Mouse. Its sleek & lightweight design make it ideal to be used out & about with your laptop or at home with your desktop. Its 2.4 G Hz frequency provides a reliable connection & also gives you a 10m roaming range. On top of all this, the X4000 features a 30 month battery life so you no longer have to worry about running out of batteries half way through the day.