The Microsoft Bluetooth Notebook Mouse 5000 is a battery-operated, wireless laser mouse that connects to a Windows or Macintosh PC via Bluetooth. It in fact requires no transceiver, which means other USB ports can be freed for other devices. And it uses high-definition laser technology for more precise and smoother tracking. Since it does require batteries, a battery life LED indicator is included as well to keep users informed about when a battery is running low. Plus, the mouse can be turned off during non-use to further extend battery life. Additional features include an ergonomic design, 2 regular buttons (L/R), a scroll wheel, and a back button.