Connection Type: Wireless, Layout: Eng, , On/Off switch: Yes, Full-size layout with 12 enhanced F-keys for media control:, Wireless operating distance: 10 m maximum, Wireless system: Advanced 2.4 GHz wireless connectivity, Sensor technology: Logitech Advanced Optical Tracking, Resolution: 1000 dpi, Number of buttons: 3, Scroll Wheel: Yes, Wireless operating distance: 10 m maximum, Wireless system: Advanced 2.4 GHz wireless connectivity, USB receiver