This Anti Sleep Alarm hooks over your ear and gets loud if you nod your head forward past 30°. It’s a very simply device, just batteries, a mercury-type switch and a beeper. The batteries are good for about 10,000 head nods so you should be fine for a while. And it’s such a good idea Chinavasion insist that you buy 10 of them, for all your hard-partying friends. But that’s ok, they’re only ~US$2.90 each.
The anti-sleep driving alarm for people doing all night drives as well as security guards and others we have to sit in one place for long periods of time without any stimulating interaction. The newest high tech way to stay awake is a good purchase for you whether if you ever have to drive back home after an exhausting day at work or just need to get something done and sleep is not an option. This trusty sleep alarm will keep you at full alert and is always ready to help if your head dozes off.