Features: 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 to use Ultrathin Instructions for use: 1. Open the battery cover 2. Take out the USB receiver from the battery compartment and plug it into a USB port on your PC 3. Insert 2 AAA batteries with correct polarity as indicated 4. Close the battery cover 5. Turn on the power switch 6. No pairing required – plug and play 7. Press down when using left, middle, and right buttons. Use the scroll wheel by sliding your finger up and down 8. When not in use, the nano receiver can be stored in the battery compartment Precautions: Use AAA alkaline batteries and observe correct battery polarity to avoid damage Turn off the mouse power switch when not in use to extend battery life Replace batteries when power is low Specifications: Type: Mouse Features: Mini Material: Plastic, Metal System support: Windows XP, 7, 8, 10 Interface: Wireless Connection: Wireless Receiver: Included Operating Voltage: 3V Operation Current: 15mA Optical Resolution: 1200 DPI Color: Black Size: 112 x 57 x 20mm (Approx.) Quantity: 1 Piece (other accessories shown in picture not included) Note: 1. Conversion: 1cm = 10mm = 0.39 inch 2. Please allow 0-1cm error due to manual measurement 3. Due to differences in monitor displays, the actual color may vary slightly from the image Package includes: 1 x Mouse