There are already devices that detect REM and provide you with hints that you're in a dream while you asleep. This still require training and practice to use, b

There are already devices that detect REM and provide you with hints that you're in a dream while you asleep. This still require training and practice to use, but make it easier to get into lucid state. Hints as simple as short bright light blinking in front of your eyes or specific sounds playing. But as other comment say there is a good chance this particular device is just pseudo scientific BS.