Which of the following is NOT a feature of a motorized mobility device?

The maximum speed of 20 mph is not a defining feature of a motorized mobility device. Typically, motorized mobility devices, such as scooters or wheelchairs, are designed for safety and practicality, leading to lower speed limits to ensure user safety and maneuverability in various environments. Speeds vary by device and regional regulations, but many are capped well below this threshold for user safety.

In contrast, the other characteristics are indeed common features of motorized mobility devices. Being propelled by a battery-powered motor is essential for mobility devices, allowing users to navigate without manual effort. Having three or more wheels contributes to stability and support, especially for individuals who may have balance issues. Additionally, many motorized devices come with a single forward gear for straightforward operation, making it easier for users to control their movement without complex gear systems.