Trackball mouse with 6-Button FunctionDesigned with a high-performance gaming optics system sensor and lensThis trackball mouse bases on ergonomics, effectively reducing users wrist strain and muscle painThis trackball mouse bases on ergonomics, effectively reducing users wrist strain and muscle painThe ball is held in place by the ball bearings, but can easily be popped out of the device, by pushing it through the hole in the bottom and it can be easily cleanedSystem requirementsWindows Vista, Windows 7, Windows 8.1, Windows RT8.1, Windows 10 or later (Horizontal scrolling function is not working in Windows RT8.1), macOS 10.10 laterResolution DPI750/1500 count (switchable)Size & WeightSizeW3.7"(94.7mm) X L4.9"(124.4mm) X H1.9"(47.9mm), Weight4.5oz(without battery)ConnectivitywirelessBattery requirement1 X AA battery(Included)Battery Remaining Light Lamp equipped
