... the dental chair manufacturers at home and abroad. Specifications: Model No: RD-C398-1Input voltage: 220-240VAC, 50HZ ; 100-120 VAC ... linear actuator,a manual board,a treatment panel, a foot switch. Model No: RD-C398-2Input voltage: 220-240VAC, 50HZ ; 100-120 ... linear actuator,a manual board,a treatment panel, a foot switch. CE & ISO9001:2000 Certified.