?Professional optical tracing engine£¬ precise positioning.?Bright LED backlit£¬ give you a colorful visual effect. <br><br><strong>Features:</strong> <br>Professional optical tracing engine£¬ precise positioning. <br>3 buttons£¬ including scroll wheel£¬ left button£¬ right button. <br>Bright LED backlit£¬ give you a colorful visual effect. <br>Ergonomic design£¬ efficiently reduce fatigue even long time play. <br>Intelligent connectivity£¬ no need to code£¬ plug and play. <br><br><strong>Specifications:</strong> <br>Brand: SONGFUL <br>Connection way: USB cable? <br>Tracking systems: Optical <br>Supported system: For Windows 98/XP/Vista/7/8 <br>Cable length: More than 140cm / 55in <br>Item size: 11.5 * 7 * 3.5cm / 4.52 * 2.75 * 1.37in (L * W * H) <br>Item weight: 92g / 3.22oz <br>Package size: 16.5 * 8 * 4.7cm / 6.49 * 3.14 * 1.85in (L * W * H) <br>Package weight: 121g / 4.26oz <br><br><strong>Package List:</strong> <br>1 * Wired gaming mouse