2.4G Rechargeable Wireless Vertical Mouse, Ergonomically Designed 10 Meters Free Control, Built-in 600mah Lithium Battery, Suitable For Office Games Features: 1:2.4GHz Wireless Connectivity (USB receiver) 2: Built-in rechargeable 600mAh lithium battery 3:Ergonomic designed to remit and carpal tunnel syndrome. 4:Optical technology for control 5:Easy to use, comfortable to hold, mouse hand. 6:L/R mouse buttons, 2 thumb buttons, and a clickable scroll wheel , 1 dpi buttons(dpi +/dpi -). Specifications: 1:Item type :2.4G RechargeableErgonomic Optical Mouse 2:Resolution : 800dpi ;1600dpi ;2400dpi. 3:Button : 6 buttons 4:Maximum operating range: 10m 5:Charging cable length: 70CM 6:Material : ABS 7:Button life : 5 million times 8:Battery capacity: Rechargeable 600mAh lithium battery 9:Voltage/Current: 3.7V/10mA Package includes: 1 x 2.4GHz Wireless Mouse 1 x USB Receiver 1 x 70CM charging cable 1 x English User Manual