1. Original external shape, Good water-proof capacity; 2. Drainage at the bottom; 3. Reversible rotation controlled by button; 4. High density abrasion wheel grinds lens fine and smooth; 5. Dimensions(L?W?H):360?220?280mm; Net Weight:8Kgs; 6. Power Requirement:100-120V/60Hz AC or 200-240V/50Hz AC 120W;