The Anti-Sleep Alarm by Seniority has been designed for your right ear that delivers a high alarm pitch to keep you from dozing off to sleep. The Zapper is an anti-drowsy alarm designed to add to the driver's awareness of momentary lapses caused by sleepiness and tiredness. The device is meant to be worn behind the right ear. As the driver's head nods below a preset angle, it emits a loud alarm signal alerting the driver to take corrective action. The Alarm is not only designed for drivers, it is perfect for people who need to be totally alert while on duty such as security guards, machine operators and even students. This device is the best choice for drivers and very effective in keeping drivers awake. If your head tilts or moves forward more than 30 degrees, a high-pitched alarm will ring. This smart device ensures your safety and keeps you aware and awake. Good to use while traveling, working or studying !