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️How to use: Put the alarm on your right ear, then turn on the switch to check whether the set alarm is appropriate. If it is not placed correctly, it will beep to remind you. for eat sleep driving alarm forcar nod off ear alarms ️Function: Once you can't help but fall asleep, the ear bell will make a crisp "beep" sound to refresh you and avoid accidents. ️High-quality material: It is made of high-quality ABS material with maximum durability. Strong and durable, not easy to wear. It has good wear resistance, high temperature resistance, corrosion resistance and aging resistance, and has a long service life . ️Applicable: Exquisite and thoughtful design, very suitable for your right ear. Small and light, easy to carry and use. for driver sleep alarm ️Battery specifications: AG13X3 (conventional button battery) battery life is about 6 months to 24 months. Color: blackbluepinkwhite (optional).