Specification: 1. Outer dimension: 400 x 370 x 160mm 2. Decorate plate dimension: 500x500mm (may be custom-made ordered dimension). 3. Decorate plate screw dimension: 380x345mm 4. Fixed plate installation hole dimension: 330x250mm 5. Max descending distance: 1000mm(Mini 215:1500mm) 6. Load capacity: max15kg 7. N. W.: 20kg 8. The headroom between the cement ceiling and decor ceiling: Min 400mm 9. Rated voltage: 220v 10. Power: 20w