Genius NX7005 Wireless Mouse - 3 Button, Optical Blue Eye Engine, Ergonomic Design, Supports USB Interface, Mini Mouse, RED. Specifications. Frequency: 2.4GHz; Number of buttons: 3; Resolution (DPI): 1200; Sensor technology: BlueEye; Weight: 56g; Dimensions: 100 x 58 x 39 mm; System Requirements: Windows 7.8 or higher; Mac OS X 10.7.4 and higher; USB port