Never lose your keys again! Smart Super Key Finder: Anti-Lost + Precise Positioning. This keyring with a key tracker will be of great help for absent-minded people, since it allows them to easily locate their keys before leaving their homes. All they need to do to locate their keys is whistle, in order to activate beep sounds and a light signal (red LED) Furthermore, the keyring includes a button to activate the red LED light on other occasions when some light is needed, for instance to open the door in the dark.
