Dental Unit Chair J2688-A1 DC Motor Computer Controlled Hard Leather with Stool Sapphire BlueDental Unit Chair J2688 A1 DC Motor Computer Controlled Hard Leather 4 Holes with Stool Sapphire 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