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SPECTRA: the Portable & Smart Electric Skateboard | Indiegogo
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SPECTRA Pro – WALNUTT
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Spectra X electric skateboard review: Hands down the weirdest esk8 ever!
SPECTRA Mini – WALNUTT
The design of SPECTRA Pro & Advanced. All SPECTRA models are equipped with the world's first 3D posture contro… | Electric skateboard, Surfboard design, Skate style
SPECTRA - The Most Portable and Intelligent E-Skateboard with 3D Posture Control System - Gizchina.com