 And it is a really quick, if the child's fairly quiet, about 30 seconds per ear, and that they don't need to respond at all. It's actually a response that the ear emits in response to a sound being put into the ear, a very soft click going into the ear. So that's the screening tool that we can utilize with preschools, and that's what we're trying to do. Some preschools have their own OAE equipment.