6. Holding the car alarm keyfob to the head will increase the range of the car alarm 17 automotive myths that are confirmed by science Remember, 5 years ago, an unusual way to increase the range of a remote car key or car alarm keychain appeared on the web? Someone suggested to strengthen the signal of the key to lean the car key to the head. Many people then thought it was bullshit. But recently scientists have proved that this method increases the range of the key. So if you lose sight of your car in the parking lot, this proven way will help you find out where you left your car...