Once under water, the occupants breathe from an integrated tank of compressed air similar to that used by scuba divers.
The sQuba’s top speed on land is about 120 km/h, but it slows down to 5 km/h on the surface of the water, and 3 km/h underwater.
Links:YouTube (video)
http://www.care2.com/news/member/616421465/633525
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