Easy to use: made of lightweight, compact and easy to carry material, the Drive Fatigue Alarm earplugs, place it behind the right ear and alarm when the head is lowered from 15 to 20. Very comfortable: The reason why Anti Sleep Alarm Drowsy is the driver's guardian angel is that it is very convenient to use and comfortable to wear for a long time. Ensure safety: With the anti-sleep reminder driver that can help prevent accidents caused by drivers' sleep while driving, it can ensure driving safety. Widely applicable: With the widely applicable car driver's sleep reminder, it is suitable for students who like to lower their heads, sit at a table or drive at night, travel long distances and drive after drinking. Great gift: The car sleep reminder tool is a great gift for your friends and family, which can ensure their safety, and very practical.