frame: high intensity aluminium frame seat width: 46cm (18inches)rear tyre:20" solid PU tyrespeed: 1-6km/h (adjustable)gradient: ≤12°driving:real tyre drivingpark brake:electromagnetismbattery:Lead-acid battery(2pcs)controller: Taiwan controllerarmrest&footrest: detachable Per charge range:20kmnet weight:60kggross weight:65kgCTNsize(L*W*H):78*45*80CM