It is true that great inventions are in fact rather simple. And so is the GSM Doorbell. This is the kind of invention you could have imagined yourself. But you didn’t. And neither did I. Connecting your GSM to your frontdoor (bell and lock) is in itself so simple, though so practical. Imagine: you won an eBay-auction and the postman is delivering the package at home. But your are not there. The postman ring (twice?) and your doorbell connects with your GSM. You can speak to the postman, asking him to leave the package at the neighbour’s. Or ask him to come back tomorrow, when you are home. And this example is also truly practical: the kids are earlier home than you thought. (Or: your are stuck in a traffic jam and too late to be home in time). They simple ring the doorbell. You hear it’s your kids and you open the door from your GSM. Truly an invention that makes you wonder why it wasn’t there earlier. I mean: how long do we use frontdoors and cellphones?
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