These are the motorized electric roller skates($700) strap right on to your shoes and allow you to coast along effortlessly at a speed of up to 8 mph, for up to 5 or 6 miles. Each skate packs an 80-watt motor that’s housed in a fiber-reinforced nylon frame, making them tough and durable. The tires are 6″ in diameter, and a hand-held wireless remote the throttle both skates simultaneously up to 8 mph. To stop, all you do is let go of the throttle or simply lean back on the heel stopper like you would a normal pair of skates. Each skate has a removable lithium-ion battery that provides up to 40 minutes of continuous power (5-6 mile range).