Connection Type: 2.4GHz wireless connection Wireless range: 33 feet (10 meters)2 Connect / Power: Yes, on/off switch Battery Details: 1 x AA Battery Life (not rechargeable): 24 months1 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