a $ 250 -lrb- £ 168 -rrb- device recognises the electronic signature of different devices - such as kettles and washing machines - allowing users to keep an eye on their home and can tell you which electrical devices are running at any one time , may sound appealing when it comes to saving energy and money .
now there 's a device called neurio that claims to make any ` ordinary home smart ' and even tells you when you 've accidently left lights on .
the $ 250 -lrb- £ 168 -rrb- device recognises the electronic signature of different devices , such as kettles and washing machines .