Key locator is a good tool to use when you lose your keys. When you lose them it would be easy to find them as in house, or car keys. You would not need to worrier about them at all. The battery does not die to fast. To find your key or any other thing, if the locator is on, it then will find it for you. You can find it by using your smart phone, the phone will tell you where it is. If the thing is attached to it.
This relates to engineering because this is Environmental Engineering, Electrical engineering, this is a life hack, and it’s with metal and plastic. This relates to engineering because it helps you find your keys. This cost about $15-$20
