English 
Wireless: Advanced wireless Advanced 2.4 GHz
The operating range of the wireless connection: 10 meters
This may vary based on user and usage conditions.
Interface: USB Nano-receiver
Battery Type: 1 x AA
Battery life: Up to 18 months
DPI (min/max): 1000 ±
Sensor Technology: Advanced optical sensing Logitech
Sensor resolution: 1000 dpi
Scrollwheel (Y/N): Yes
Number of buttons: 3
Standard and special buttons: Clicking the middle mouse button