Description: Features: 100% brand new and high quality. 2.4GHz wireless mouse Optical technology Number of keys: 3 Battery: 2xAAA (not included) 10m effective distance Built-in energy saving system Elegant and ergonomic design Scroll easily in any direction Comfortable in using Ultrathin Instruction for use 1. Open the battery cover 2. Take out the USB receiver form the battery compartment, plus it into a USB host on your PC. 3. Insert 2 AAA batteries with correct polarity (+/-) as indicated. 4. Close the battery cover. 5. Open the power switch. 6. Don't need to pairing, plug and play. 7. When touch left, middle and right, you need to press down. Using the scroll wheel show as pic1, you can slide your figure up and down. 8. If you do not use this mouse, nano receiver can be placed at the beside of the battery compartment. Precautions: Put into the AAA alkaline batteries, note the polarity of the battery, in order to avoid damage to the machine. Turn off the mouse power switch to extend battery life, when you do not use the computer. Low battery can not be used, and please replace the batteries with new ones. Specifications: Type: Mouse Features: Mini Material: Plastic, Metal System support: OS Windows XP 7 8 10 Interface: Wireless Connection: Wireless Receiver: With Operating Voltage: 3V Operation Current: 15mA Optical Resolution:1200DPI Color: Black Size: 1125720mm/4.402.240.79in (Approx.) Quantity: 1PC (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 X Mouse