Microsoft Bluetooth Notebook Mouse 5000 for Business Exclusively for Bluetooth PCs - Transceiver-free and confident wireless connection to your Bluetooth PC. Microsoft High Definition Laser Technology - More responsive, more precise, and smoother tracking (compared with standard laser products). Battery Indicator - Battery light indicates when your battery is running low; an on/off switch helps you conserve power. Comfort - Ergonomist-approved ambidextrous design provides comfort in tight on-the-road situations. 4 Buttons - Use the Back button to easily navigate between folders and Web pages, or press the wheel for Auto-scroll.