Vertical ergonomic design fits perfectly into the natural contour of the wrist and palm. 👉 The comfortable posture of this mouse increases the frequency of control, removes the occupational syndrome of the carpal tunnel. 👉 Professionally designed for office staff and players. ℹ️ 2.4ghz wireless connectivity ℹ️ Optical laser technology for precise control. ℹ️ L/R buttons, 2 thumb buttons and a clickable scroll wheel. ℹ️ On batteries ℹ️ Size: 102x72x82mm ℹ️ Connection Method: Wireless DPI: 1600 ℹ️ Connection point: USB 2.0 ℹ️ Battery: Built-in rechargeable 450ma lithium battery ℹ️ Working time: about 20 days ℹ️ Compatible with: win98/2000/xp/vista/7/8/mac ℹ️ Package Includes: 1 x Wireless Mouse 1 x USB Receiver