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The smart cab that spots if you leave anything behind

22 November 2013 Last updated at 08:41 GMT

Ever taken a taxi and then later realised you have left something behind on the back seat? A new cab in Tokyo has the answer to the problem of forgetful passengers.

BBC Click's Spencer Kelly looks at the Tokyo taxi that alerts you if you have left anything behind.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.

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