Today I bought Smart Alert - the stay alert device designed to raise drivers awareness of momentary lapses caused by sleepiness and tiredness. Why I bought it? Because I've had the experience of fallen into a sleep (within a blink of an eye) and crashed into an accident!
The one I bought is a cheap one, only RM25. I supposed there are better ones but at the moment I can only afford this one and hopefully it will function well and lasts long enough until I have more money to buy a better gadget.
No doubt that it is a very important gadget and my personal experience is a testimony to that. However, its effectiveness is still to be tested and I hope to test it right away - but still have to wait when I got tired and sleepy while driving lah.....
So, how does this thing works? Well, you are supposed to wear it behind your right ear. It works in the principle of electronic balance. As the your head nods (due to sleepiness) below a certain angle it emits a loud signal or a strong vibration (depending which model you bought), alerting you to take corrective action, such as taking a break or even take a nap. 
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