Features: 2.4GHz digital wireless transmission,operation distance is up to 10 meters. Portable and weight light, very convenient to carry and store. 800dpi/1200dpi adjustable cursor speed. With 6 Keys, including Scroll Wheel, Page Forward and Page Backward buttons for easy Internet Surfing. Shortcut button can be used to browse the Internet or applications quickly. Intelligent Power-saving technology, Power switch, the service life of one alkaline battery is up to six months. Built-in mouse memory, Intelligent connectivity, no code needed, plug-and-play. Ergonomically designed, comfortable grip. Specification: RF: 2402MHz-2480MHz RF operation channel: 16, automatic frequency hopping Rated voltage: 1.5V Rated current: 12-20mA Max. Acceleration: 14ft/Sec USB: V er 1.1/2.0 Power Supply: 2 x AAA Battery(Not included) Color: Red, Gray, Black (Optional) Size: 11 x 6.9 x 3.7cm / 4.3 x 2.7 x 1.45inch Package Weight: 63g Quantity: 1pc System requirement: 1. Use with Windows 2000/XP/Vista/Linux/Win 7/MAC operation system 2. One available USB port Package included: 1 x Wireless Optical Gaming Mouse 1 x Receiver 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 necessary 4. 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, press the right or left button. 5. Never waste the battery and throw it in fire. Put battery into battery recycle bin. Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.