Mid wheel drive allows for tighter turning radius. PG Controller with diagnostic fault codes. On board charger. Joystick can be mounted on either side. Front swivel anti-tippers have true independent adjustable suspension. Helps prevent the drive wheels from losing contact with the ground. Drive mid wheels have flat free inserts including coil spring tension suspension. Uniquely designed Dynamic Drive suspension for greater climbing ability and comfort when traveling forward and in reverse. Front and Rear semi-pneumatic swivel wheels. Foot plate is angle, height and depth adjustable. Elevating legrest or footrest kit available. Deluxe height adjustable captains seat with swivel seat. Positioning belt standard. Optional auto flip back footplate for safe exit from chair. Arms are width, height and angle adjustable. Standard headrest is height adjustable. Seat reclines for comfort and folds down for portability. Exceptional climbing ability. Has been tested and surpassed the ANSI RESNA testing requirement. Built in Amp meter. Batteries (Item #U1)300 lb. Weight Capacity.