The authorization was given to the life science firm NeuroSigma based in Los Angeles.
The device is designed for children aged 7 to 12 years who do not take a prescription for the disease.
Children carry a small adhesive patch while they sleep. It then supplies a low electrical pulse to parts of the brain that are responsible for ADHD symptoms.
It's called the monarch's external trigeminal nerve stimulation system (eTNS).
The device is currently not covered by insurance and can cost just over $ 1,000.