Welcome to our store! [Comfortable Grip] Comfortable grip, suitable for office, gaming, etc. Ergonomic design to prevent wrist pain. [Get Rid of Fatigue] Using the wireless mouse for extended periods will alleviate fatigue. Take care of your health and avoid carpal tunnel syndrome. [High Resolution] Optical resolution of 1000dpi / 1600dpi / 2400dpi, suitable for laptops and desktops. [Precise Control] Vertical ergonomic mouse with 2.4GHz wireless connection. Optical technology is used for precise control. [Adaptive System] System Requirements: Compatible with Windows, Vista, OS X, or the latest version. Item Type: Wireless Optical Mouse Material: ABS Wireless Distance: Approx. 10m / 11yd Rated Voltage, Current: 1.5V, 20mA Color: Black Working Principle: Photoelectric Power Supply: 2 x AAA batteries (batteries not included) Number of Keys: 6 keys (4 buttons, 1 scroll wheel, 1 DPI button) Optical Resolution: 1000dpi / 1600dpi / 2400dpi Key Lifespan: 8 million times System Requirements: For Windows, for Vista, OS X, or the latest version. 1 x Mouse 1 x USB Receiver Customers are our top priority. If you encounter any product issues after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.