Write a character sketch on Lawrence Rook/smart bell inventor.
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Answer:Smart Bell, designed by 13-year-old Laurence Rook, dials the homeowner's mobile phone when pressed, allowing them to talk to whoever is outside their front door.
The device even produces a small amount of white noise to give any unexpected guest the impression they are speaking to someone inside the house on an intercom system.
The invention, which uses an inbuilt SIM card and existing mobile-phone technology, would also allow homeowners to give instructions to drivers making deliveries at their property.
Laurence has already sold 20,000 units to telecoms giant Commtel Innovate and is finalising a deal with an unnamed second company for a further 25,000 units.
When the deal is signed, he will be £250,000 richer.
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