Made of ABS. The emergency alarm can make a 140db loud sound to draw attention to protect you from having an emergency even at distances as far as 606.9 ft. In addition, the sounds could last 50 minutes continuous ear piercing alarm. It with 3 AG13 LR44 batteries for extended life! They'll last up to 365 days. With LED lights, the emergency alarms can be applied for night lighting, suitable for people at all ages.It can be used on airplanes.