SUNGI-Supply mouse to HP company from 2008 till now!  Quality is our culture!  Pursuit Healthy Life, Here is Your Beginning: This is a protect your wrist mouseOffice no longer hand acidThe Gospel of healthWe improved the structure, no longer hand, roller no longer breaksYou will like to use it for a long time This is a full of vitality of the mouse, full of innovation and healthy.Elements: by changing the use of gestures, natural products with the shape of the hand, effectively prevent the wrist and arm ache;Add rubber oil coating to prevent sweating fingers slide;With buckle inside, fix mouse between usb cable firmly.(only for wired)Bring people in the office and game play-ers enjoy healthy and comfortable.Provide OEM service to customer.Specifications: Measurements103x72x56mmWeight119.5gOperated range1.4mTransmit power+5db maxWorking voltage3.7VButton number6 buttonsCharging current800-1200-1600 adjustableWork with Windows2000/WindowsXP/Windows vista/Windows 7/Linux/Android, ect