When you are feeling drowsy while driving and it has become a regular and unavoidable phenomenon, it is better to buy a device to prevent falling asleep while driving. Some of the best anti-sleep alarm devices are mentioned in the article above. But you may be confused as to which one is the best anti-sleep device for drowsy drivers. Well, you can trust the Driver Fatigue Alarm to get the best experience. It has both a vibration and sound alarm system that sends a signal whenever you feel drowsy. It is easily placed behind the ears and sends signals whenever drivers feel drowsy.