Dental Unit Chair J2688-A1 Computer Controlled DC Motor Hard Leather with Stool Sky BlueDental Unit Chair J2688 A1 Computer Controlled DC Motor Hard Leather 4 Holes with Stool Sky Blue. All controlled by the electric valve, DC Motor, Automatic thermostatic water supply system, Compensate Wider Dental Unit. Integrated box and spittoon design, more simple and practical. FDA Approval, Two Year Warranty. Product manual download Overview ERGONOMIC DESIGN, SIMPLE AND ELEGANT ECONOMICAL, SIMPLE AND PRACTICAL Integrated box and spittoon design,