Compact wireless 6-button mouse with very high scan precision on practically all surfaces The laser sensor makes exact control of the cursor possible on almost any surface Noiseless main buttons for relaxed working without disturbing noise Practical 4-way scroll wheel for vertical & horizontal scrolling Storable USB (Universal Serial Bus) receiver can be transported inside the mouse to save space Separate onoff switch allows for energy-saving use of the mouse If the battery voltage is too low the indicator light begins to flash which means that the batteries should be replaced With software for reprogramming the buttons The sensitivity can be switched to 800 & 1600 dpi Smart-Link technology for easy start-up System Requirements Operating system Windows 1087 Vista XP USB (Universal Serial Bus) port Note for Consumers The main buttons (left & right mouse button) do not make noise The software for reprogramming the buttons is available for free download You will find the corresponding link in the operating instructions