Logitech ( M 331 ) Cordless Notebook Mouse

Technical Specifications Connection Type: 2.4GHz wireless connection Wireless range: 10 meters* * It may vary based on use and computing conditions. Connect / Power: Yes, on/off switch Battery Details: 1 x AA Battery Life (not rechargeable): 24 months* *Battery life may vary based on user and computing conditions. DPI (Min/Max): 1000 Sensor technology: Yes, 2D, mechanical Sensor resolution: 1000 dpi Scroll Wheel: Yes Number of buttons: 3 Standard and Special Buttons: Middle click