This handy tool detects the psychokinetic energy that all apparitions give off. This accessory is also known as an Aurascope. Invented by Dr. Spengler, it is a vital device for all up-and-coming Ghostbusters. Add it to your arsenal today and start busting ghosts around your neighborhood just in time for Halloween. Product Details This ghost-busting gizmo is made from blow-molded plastic. It measures to be 11inches long. It has a lightweight construction so a Ghostbuster of any age and size can keep this useful gadget on their person with ease. However, we also suggest that whoever may wield this mighty instrument be at least 6 years of age.