1, fashion appearance 2, certified quality 3, competitive price 4, OEM is welcome 5, fast delivery Optical Mouse GI-M1000:1. 3D wired optical mouse. Advanced optical engine2. Interface: can make PS/2, USB, Retractable, U+P(combo)3. Resolution: 1200DPI, also can change for you4. Key lifetime up to 3,000,000 times, roller lifetime up to 500,000 times.5. Humanized design, comfortable to hold, agile ...