The Nap Zapper is an anti-drowsy alarm designed to raise drivers awareness of momentary lapses caused by sleepiness and tiredness. Worn behind the right ear it works on the principle of electronic balance. As the drivers head nods below a preset angle it omits a loud alarm signal alerting the driver to take corrective action ie, change drivers, take a break or even take a nap. The Nap Zapper is not only designed for drivers, its perfect for people who need to be on full alert while on duty such as security guards, machine operators, and even students who need to work on their posture.