The 423 chair sets the standard for traditional dual-power upright exam chairs as it moves smoothly and rapidly from a sit-up chair position to a flat position with footrest extended using the coordinated power back/foot function. The 423 is available in either of two entry/operate heights, a high base “H” model, 21” (53.3 cm) entry height with 16” (40.6 cm) of vertical rise and an ADA compliant low base “L” model, 19” (48.3 cm) entry height with 11.5” (29.2 cm) of vertical rise; which together outperform every other competitive dual power exam chair. Standard features include: 24-volt low voltage DC motors, 11.5” (29.2 cm) or 16” (40.6 cm) vertical travel power lift base, coordinated power back/foot, flip-up lock-down arms, cast aluminum compensating patient footrest, electrically operated lock/ unlock of the swivel top, articulating headrest, all steel frame and cushion substrates, dual-side back mounted membrane switches with swivel lock/unlock feature, two user-settable program positions, auto return, stop/cancel, and any button cancellation.