The Turbo Jetts electric heel wheels keep the fun rolling at speeds up to 10 mph (16 km/h) for up to 30 minutes of continuous use. The 80-watt, geared-drive motor delivers smooth, steady power, allowing riders to control the action with their preferred foot. The Turbo Jetts are powered by a 12-volt, lithium-ion, quick-change battery pack that delivers an electrifying ride. Simply start rolling and the motor automatically kicks in with its integrated, pressure-sensitive, power control system. Heavy-duty polymer "quick click" frame with hook-and-loop strap provides an easy, secure fit. Hit new heights of fun with the Turbo Jetts electric, motorized heel wheels! Simply start rolling and these electric-powered heel wheels amp up the action with an 80-watt, geared-drive motor to provide a one-of-a-kind boost to any pair of sneakers. Remoteless, the Turbo Jetts use an integrated, pressuresensitive, power control system to help you ride comfortably at speeds up to 10 mph (16 km/h) for up to 30 minutes of continuous use. Simply step into the heavy-duty polymer "quick click" frame and tighten the hook-and-loop strap for a secure fit for sneakers U.S. size youth 12 to adult 12 (European youth 42 through adult 45).