The Smily J is a dental unit set that is available as either standard or custom-made equipment. ?Chair has two motors: one hydraulic motor for elevating/lowering the seat and a gear-motor for reclining/raising the backrest ?Chair elevating/lowering is quiet due to the hydraulic ram system ?Chair operation is simple due to high quality memory and two auto switches ?Patients can receive treatment comfortably due to the chair?s soft movement ?Fine Joint Air Turbine is easy to operate because 1) no tool is required when the bur is inserted or removed 2) vibration during cutting treatment is minimal placing a low burden on the dentist?s hands 3) the hand piece has excellent balance and is the ideal length for precise cutting work ?Can be upgraded to suit individual needs ?A variety of optional equipment is available which can enhance both efficiency and function ?Upholstery offered in four colors: lobelial blue (OL-28), pastel blue (L-2208), light gray (L-2771), and pastel yellow (OL-19)