Bezicni, USB (Nano receiver), Opticki, Senzor Logitech Advanced Optical Tracking, DPI: 4000, Broj tipki 3, Domet: 10m, Connection Type: 2.4 GHz wireless connection, Connect / Power: Yes, on/off switch, Battery Details: 1 x AA, Battery life: 18 months, Scroll Wheel: Yes, 2D, optical, Standard and Special Buttons: Middle click