1. By the way of double locating, it would correct errors automatically
2. Offering more clearer and sharper pictures
3. Increase the picture density; there are 5 icons in one line
4. The charts are bigger: 33*22.5(CM)(in 5M refraction)
5. Projected by wireless remote controller
6. Able to project the charts one by one
7. Standard accessories, the metal board is covered by bias material
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