Hi,my dear angel, welcome to Jacenvly, our products are cheap and good quality, price is fair, you can't miss it. If this product is not your style, please click on our store, we have many kinds of products, there will be you like and suits you. If you have any questions about your purchase, please send us the first message, we offer world class customer service to make your purchase without your worries. Have a nice day. 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 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.