★★★Upgraded LIGHTNING 2.0 comes with central display, separate throttle and stabler handlebars
★★★Upgraded D4+2.0 comes with central display, separate throttle and stabler handlebars (P.S.: The new hardlebars can not be folded.)
D4+2.5 upgrades the suspension and brakes
★★★Upgraded D4+3.0 comes with central display, separate throttle and stabler handlebars (P.S.: The new hardlebars can not be folded.)