No doze off while driving / No doze off while driving

Almost one in five drivers have dozed off behind the wheel ,but it is very dangerous.
this product provides a most timely intelligent solutions to prevent drowsiness while driving：
Major Function：
1 Detect dozing of while driving
(By detect the position of the line of sight and distance betwwen eyelids)
2 When the dozing intention is detected, product will send out warning voices(hearing design), and a cold and refreshing perfume (touch design and smell design) will be sprayed into the face.