Logitech M280 2.4GHz 3-keys 1000DPI Wiress Optical Mouse 1. Create hand comfort: The soft rubber grip is curved to give your right hand great comfort. 2. Battery life up to 18 months: Energy efficient batteries, no need to change frequently. In addition, the mouse automatically goes to sleep when not in use. (Battery life varies by user and calculation conditions). 3. Smooth and accurate tracking: Using Logitech advanced optical tracking technology, it has extraordinary accuracy and responsiveness. 4. Plug and Play Ultra Micro Receiver: The ultra-miniature receiver enables convenient and riable wiress connectivity. Technical Parameters: 1. Sensor Technology: Logitech Advanced Optical Tracking Technology. 2. Resolution: 1000dpi. 3. Battery life: 18 months. 4. Battery: 1 AA battery. 5. Number of buttons: 3. 6. Scroll whe: . 7. Tilt function: None. 8. Mouse support Unifying Exclent Technology: . 9. Receiver support Unifying Technology: No. 10. Wiress receiving range: 10m. 11. Wiress System: Advanced 2.4GHz wiress connectivity technology. 12. Connection interface: USB receiver. Specification: Mouse (height x width x depth): 105.4x67.9x38.4mm. Mouse weight (with battery): 91g. Ultra-micro receiver (height x width x depth): 14.4x18.7x6.1mm. Ultra-miniature receiver weight: 1.8g. System Requirements: 1. Windows Vista/Windows 7/Windows 8/Windows 10. 2. Mac OS X 10.5 or higher. 3. Chrome OS. 4. Linux Kern 2.6+. 5. USB port. Package Contents: Wiress mouse x 1 Ultra Micro Receiver x 1 User Documentation x 1