What the MX900 does bring to the table over the MX700 is it'll transform your computer into a Bluetooth control center. Bluetooth is finally starting to have some useful applications and more and more products are starting to use them. Bluetooth is a personal wireless network which offers up to 10 meters of range for secure data transmission with other Bluetooth enable devices. A few years ago, Bluetooth devices were few and far between. Today, they're everywhere - in your PDA, cell phone, printer, notebook, etc. In order for all these Bluetooth devices to talk to each other you need a Bluetooth hub or control center. This is where the MX900 comes in as its docking station not only recharges the MX900 batteries but doubles a Bluetooth hub as well.