Car Driving Electronic Tools Anti Doze Off Tool Head Hoop

Feature: 1.This is the head hoop for driver when they are sleepy.During the driving tour,wearing this could help you be awake if you are about to doze off, avoiding the car accident,keeping you safe. 2.The working priciple:there are two pole minisize vibrate electronic component built inside the hoop,when you are dozing off,to bower or to raise your head,it would rouse vibration stimulation automatically,to awake the driver. 3.This device would work and turn off through shaking your head. 4.The current of this device has low mA,would do no harm to human body. Specification: For Head Circumference 57-63cm Charging Voltage 5V Using Time 12 hours Battery Capacity Polymer Lithium Battery 390mA Hoop Material Nylon Shell Material PC Note: This device is only for alram,for your safety,please DO NOT drving when you are sleepy. Package Included: 1 X Head Hoop 1 X Head Hoop 1 X Charger 1 X User Manual