Description: Vertical Mouse Ergonomic Gaming Mouse : Scientific encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. Plug and Play: 2.4G wireless transmission technology, 10 meters working distance, plug and play, easy to use. Adjustable DPI: 3 DPI levels (800/1200/1600 DPI) allow you to easily change cursor sensitivity and track more smoothly on various surfaces. Silent Click: Special soundless design for the right and left buttons, help you build a quiet atmosphere without disturbing others.fits the hands perfectly and reduces hand fatigue, also can decorate your home/office desktop. Type: 2 types can be choosed. USB Charging type mice has built in 500mah high capacity rechargeable battery that can be used for months. Battery type needs AA*1 (Not included). with a USB Receiver, easy to use. Specification: Wireless technology: 2.4G Wireless distance: 10m Size: 104x60x76mm Weight: 105g Key number: 6 Resolution: 800/1200/1600dpi Operating cycles: 1,000,000 cycles Battery: USB Charging type: 500mah lithium / Battery type: AA*1 (Not included) Material: ABS System requirement: Windows 2000/ 2003/ ME/ XP/ Vista/ Win7/ 8/ 10/ MAC OS/ Linux Size Chart: 104x60x76mm/4.09x2.36x2.99inch Package Includes: 1 Piece Wireless Mouse 1 Piece USB receiver Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!