[force ten]

also a lot of the new cars now have an accelerometer type sensor built into the key fob so when you go into the house and put the key down it goes to sleep and stops transmitting any signals

Car makers including Audi, BMW, Mercedes, Ford and Volkwagen are introducing new key fobs with built-in motion sensors that automatically enter a “sleep mode” when they’re left unattended for a certain period of time.

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