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Drive alert nap zapper alarm anti-sleep alarm for on duty person electronic position sensor anti-drowsiness / tiredness alarm The drive alert 'Nap Zapper' alarm is an innovative, potentially lifesaving anti-drowsiness / tiredness alarm. You just wear behind the right ear it works on the principle of electronic balance.It is worn over the ear and has an electronic position sensor. When your head nods forward, it sounds or vibration a loud alarm to instantly wake you and alert your passengers. The 'Nap Zapper' alarm is not only designed for drivers, it is also perfect for people who need to be fully alert while on duty, for example, security guards, machine operators and even students while studying or where concentration is required. Specification: Driver safety alarm to help prevent accidents caused by falling asleep at the wheel. Brand new anti-sleep alarm for drivers! Perfect for anyone who needs to keep alert on duty, like drivers, guards, machine operators, and even students Safe for long drive and drive at night. Especially suitable for long-distance driving or night driving It is guardian angel for drivers. Easy to use and comfortable to wear for a long time. Powerful alarm beep Work on the study of human body balanceMain Function: Anti Sleep Alarm Alarm mode: Beep Dimensions: 75 x 22 x 15mm Angle of Protection: 15 30 Life time: 3,500nods * 3 = 10,500nods