Features: Merits MA01 has multiple safety certifications and complies with international safety standards Installation requirements: The diameter of the wheelchair bracket needs to be 2 to 2.5 cm (6 minutes to 1 inch) Greatly enhanced forward force, easy to advance on slopes/grass/gravel The controller is specially designed to be easy to operate and suitable for anyone to use The controller can be mounted on the handle of the wheelchair for others to assist in moving Equipped with a quick lift function, it can be lifted up when not in use to avoid friction between the electric rear wheel and the ground The whole car (including motor and charger) is made in Taiwan, with emergency short circuit device