While these vehicles emit a low-level signal that should only be detected by a key fob paired with the vehicle, researchers have found that antennas can work as repeaters to trick the vehicle system into thinking that the key fob is right outside the door. The trick required two antennas: one within 26-feet of the key fob and another near the vehicle. The antenna near the key fob will receive the signals and relay them to the other antenna near the vehicle, which is good enough to trick the car. Will this cause you to have second thoughts about installing a keyless entry system in the future?