Specification: Buttons: 7 buttons with scroll wheel. Tracking systems: Optical. The Max DPI: 800-1600-2400-3200 Ultra-precise Scroll Wheel. Optical technology works on most surfaces. Ergonomically designed, long-term use without fatigue. Intelligent connectivity, no need to code, plug & play. Built-weight iron, feel comfortable, mobile and stability. Switch Life: 5 million cycle. Compatible with Windows XP, Vista, Windows 7, ME, 2000 and Mac OS User for: The high-end players, gaming professional players. Package included: 1 X Gaming Mouse Ships in 7 business days. It is shipped from China. Delivery is provided by China Post Air Mail. Delivery time depends on the couriers, local customs in your country also holidays, weather conditions. Usually it takes from 39 to 60 days, depending on the customs at your country.