Specifications:1:Item type: Ergonomic Optical Mouse2:Resolution: 2400dpi.3:Button: 4 buttons and 1 wheel (middle button)4:Dimension: 100*80*70mm5:Maximum operating range: 10m6:Charging cable Length: 50.5cm7:Color: Black8:Material: ABS9:Keystroke life: 10 million10:Tracking system: optical11:System Requirements:Windows 98/Me/2000/XP/Vista/Win 7/Win8.12:Item weight :133g Features:1:2.4GHz Wireless Connectivity (USB receiver & rechargeable mouse usb cable included)2:Built in rechargeable battery3:Ergonomic designed to remit and prevent carpal tunnel syndrome.4:Optical laser technology for precise control5:User convenience with -pen's signature, pen-grip comfort.6:L/R mouse buttons, 2 thumb buttons, and a clickable scroll wheel7:You pick the hand position that best suits you. Plug and play, compatible with and PC Note:1, USB cable can only be used for charging. It can not be used as wired mouse.2, The mouse can be used while charging, but you should make sure that the USB receiver is plugged into the computer and the mouse switch is turned on.Wireless Mouse 2.4GHz gaming game mouse Ergonomic Design WOWPEN Vertical mouse 2400DPI JOY Wrist Pain USB Mice For Laptop PCNotice:this mouse dont need to use AA battery now .it have battery inside the mouse!you just used USB cable charging!!!! now did not need to worried to buy batteriesagain again!This wireless mouse vertical ergonomic design for you, help you tireness after long use of the wireless mouse. Care more about your health. Avoid carpal tunnel syndrome Package includes:1 x Mouse1 x USB Power Adapter1 x USB Charging Cable1 x English manual"Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.