Patent ID: 8903494

Claim:
A two-part, self-contained, adherently attached, lightweight and wearable transdermal electrical stimulation device for inducing a cognitive effect in a subject, the device comprising: a low-profile primary unit including: a power source, a controller including a current source configured to apply a current at a frequency of greater than 640 Hz, a first transdermal electrode mounted on an inner surface of the primary unit; wherein the primary unit has a maximum thickness of less than 30 mm, and a power supply access port on the inner surface, wherein the power supply access port is covered by the first transdermal electrode to prevent access when the first transdermal electrode is mounted to the inner surface, and a secondary unit electrically connected to the primary unit by a cable extending from the primary unit, the secondary unit including a second transdermal electrode; wherein either the primary unit or the secondary unit or both is configured to be worn on the subject's head or neck, and the secondary unit is configured to be independently positioned at a second location on the subject so that the controller can drive stimulation at greater than 640 Hz between the first and second electrodes to induce a cognitive effect in the subject.