The Quantum Edge 3 Stretto is a versatile powerchair that can be used indoors and outdoors. TGA Whill Model C2 Powerchair ELECTRIC WHEELCHAIR 4 MPH FOLDING. TOP SPEED: 5 MPH. GREAT OUT DOOR CHAIR WITH LARGE TYRES AND BLOCK TREAD PATTERN GIVING IT ONE OF THE BEST ALL ROUND CHAIRS, NICE LARGE POWERFUL 4 MPH MOTORS!