Vertical Mouse, Convenient Ergonomic Wireless Optical Mouse for Computer for Office for Gaming for Home Specification: Item Type: Optical Vertical Mouse Connection with Computer: Wireless Optical Resolution: 1600DPITransmitting Power: +5db maximumNumber of Keys: 6 Keys Wireless Frequency: 2.4Ghz Resolution: Three levels and belowPolymer Lithium Battery: 500mAhHow to Use: 1. Turn on the mouse power switch 2. Insert the wireless USB head into the USB interface 3. Mouse can be Package List: 1 x Mouse 1 x Charging Cable 1 x USB Head 1 x User Manual Right-Handed Optical USB Wireless Ergonomic Vertical Mouse, Violet Ergonomically designed for right-handed users to reduce muscle strain and alleviate wrist pain, shoulder fatigue, carpal tunnel syndrome, and tendinitis Utilizes 2.4GHz wireless technology for fast data transmission, providing a stable and reliable connection without interference within a 360-degree range up to 10 meters Features an advanced optical engine for faster response speed, smoother tracking, and higher accuracy with three adjustable DPI settings (800/1200/1600) to meet both general and gaming needs Includes an independent on/off button for intelligent power saving, effectively conserving energy when not in use