Specification:

• Driver safety alarm to help prevent accidents caused by falling asleep
• 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 balance
• Alerts when the head loweren in the degrees of 15-20 
• Powered by 1 x LR44 button cell battery (included)
• Colour: blue, black
• size:6.5*5.0*1.3mm