It ought to stand for Intermittent Keyhead Transmsmitter as it never seems to lock the car on the first try. Don't have much of a problem unlocking the car or opening the trunk. I've tried altering position and distance to no avail. Multiple attempts often result in the unintentional activation of the horn, which is much louder than the confirm/ car finder "chirp" described in the owner's manual. I never had this problem with my last car/ transmitter which reliably locked the car on the first attempt. Anyone else had this problem or discovered a solution?