Don't use this while you're driving. but, of course, many people will ignore that. >> and who is, how do they know if a space is big enough for your car? like you have a big suv or something. do they adjust for that at all, or is that still in the works? >> reporter: it's a good question. but the sensor works well enough that it really doesn't matter what car is parking in that spot. it can tell whether or not it's blocked. and so if that space is free, it will be uploaded to the app, and so it will tell you. so it doesn't really matter what car you're driving. but you touched on it earlier. w...