As reports circulate about tech-savvy thieves using electronic devices – “key jammers” – to prevent cars from locking, what do you need to know about this growing crime?

 

The transmitters, which are easy to buy online, can be used to interrupt signals from keys fobs, meaning unwary motorists believe their cars to be secure when they’re anything but.

This leaves the path clear for thieves to help themselves to your belongings, and even take the car itself.

Relatively low-powered jammers can have a range of about 75m, meaning fairly large areas, such as a whole car park, can be affected at the same time.

But jammer-wielding crooks can strike anywhere, not just public car parks.

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