Sleep Alert,Drive Alert,Posture Adjuster (WL12A)

an anti-drowsy alarm to raise drivers awareness of momentary lapses caused by sleepy and tireness.Wear behind the ear,when drivers head nods below a preset angle,it emits a loud alarm signal alert driver to take correct action,take a break or a nap, it can be also perfect for people who need fuul alert while on duty such as security guards,machine operation,and even students who need to work on their posture.