The APTICO Wireless Trackball unites comfort with functionality unlike practically any other input device. Compared to standard mice, no additional space is required to move the cursor around, so you can make maximum use of every precious centimetre of desk space. It offers all this with the same amount of functions plus maximum precision - even when you don`t have a mouse pad. Another huge plus-point is that your hand stays in a relaxed position, so the APTICO Trackball prevents wrist pain and strain.Thanks to this input device you`ll enjoy incredible comfort plus maintain a healthy posture.Features2.4GHz Wireless Technology5-Buttons with Built-in TrackballComfortable Thumb ControlSpace-Saving ShapeErgonomic DesignNano USB ReceiverWireless Range: up to 8mLaser Sensor: up to 1600dpiDPI switch, for Toggling Between Dour Sensor SettingsLED Displays Current DPI SettingAutomatic Tracking-Speed AdjustmentQuick and Easy InstallationNo Additional Drivers RequiredEasy to Clean, Thanks to Removable TrackballRubberised 4D Scroll WheelNon-Slip Rubber FeetOn/Off SwitchBattery Included (1 x AA, 1.5V)Dimensions: 100 x 133 x 45 mm (W x L x H)