Х-ка 5: Wireless range: 10 meters (Actual wireless range may vary based on use, settings, and environmental conditions)
Х-ка 6: 18-month battery life - Go longer between battery changes thanks to energy efficient engineering. M220 SILENT automatically puts itself to sleep when not in use. (Battery life may vary based on user and computing conditions)
Х-ка 7: Comfortable shape, Mobile size - Ambidextrous design offers more comfort and precision than your touchpad. Its small size is perfect to toss in a bag and go.
Х-ка 8: Package Contents: Mouse, Nano receiver, 1 AA battery (pre-installed), User documentation