Mice & Trackballs 2.4Ghz Wirele Mouse With DPI Adjustable Button for Windows 7/XP/2000/Vista, Portable Computer Gaming Mouse for Desktop/Laptop Specification:1. Wirele transmiion distance: about 10m2. RF: 2402MHz-2480MHz3. RF operation channel: 16pcs, automatic frequency hopping4. Rated voltage:1.5V5. Rated current:12-20mA6. Key stroke: 0.8mm7. Keystroke force: 60-7010g8.Max. Acceleration:14ft/Sec9.USB:ver 1.1/2.0System requirement1.use with Windows 2000/XP/Vista/Linux/Win 7/MAC operation system2.One USB available port.Feature:1.built-in mouse memory,no recoding is needed after battery replacement.2. Optical positioning, positioning is more accurate.3.Intelligent Power-saving technology,the service life of one alkaline battery is up to six months4.Intelligent connectivity,no need to code,plug-and-play.5.Ergonomically designed,comfort grip.6.Dormant cla control and more power-saving hibernation connectionle.7.800dpi/1200dpi cursor speed adjustable.8.Shortcut button can be used to browse the Internet or applications, easily on the toolbar "forward" and "backward" function9.Power swith,in the case of not using power off completely.Cautions:1.Operation distance is closely related to the environment.2.Battery life may be different for personal habit of using mouse.3.In case of mouse failure,please check battery power and replace it as neceary4.The mouse will shut off automatically and enter sleeping mode for saving power when it's not used for a long time.To wake it up,pre the right or left button.5.Never waste the battery and will it in fire.Put battery into battery recycle bin.