System requirements Windows 7, 8, 8.1, 10 Mac OS 10.7.4 or later USB Port Specifications Sensor engine Optical Cable length 1.5m Number of buttons 3 (left, right, middle button with scroll) Colors Black, White, Blue, Red, Green Weight 85 g Dimensions (W x H x D) 60 x 105 x 37 mm (2.36 x 4.13 x 1.46 inches) Resolution (DPI) 1000 What's included DX-120 Warranty One year limited hardware warranty* * Warranty void if unauthorized opening or repair.