Combines the features of a rollator and transport chair into one unit. The user can ambulate independently or be pushed safely by a caregiver. * The tool-free two-position contoured backrest is reversible depending on whether you are using the Nitro Duet as a rollator or transport chair. * Back support height easily adjusts with tool-free buttons. * Caster fork design and large 10 front casters enhances turning radius and rolling comfort. * Cross-brace design allows for side-to-side folding and added stability. * Brake cables routed inside the frame add safety and convenience.