Use the Duet as a rollator or transport chair. The new Duet from Drive Medical combines the features of a transport chair and rollator so an individual can ambulate by themselves or be pushed by a caregiver. The Duet has a flip-up footrest that allows the user maximum comfort during transport. When the footrest is flipped-up the Duet looks like a normal rollator with seat. The backrest flips from front to rear to provide a comfortable backrest when used as a transport chair.