... , pleasant awakening sound alerts you when the head nods forward. Function: The innovative and our patent product is designed ... , yellow, green, red. (Other colors should be ordered in quantity) 4) Power: AG5 (1.5V X 2) Battery ... two different logos engraving on the front of the product, one is logo of our company "Welkin, the other a "Baby Angel". ... -drowsy alarm wore on ear(logo of baby angel) in yellow