Complex sentence: The device transfers a small alternating current across the user's head via a pair of ear-clip electrodes and is reported by the manufacturer and its users to be effective as a way to assist with relaxation, stress reduction, sleep problems and mood problems.
Split into simpler sentences: The device transfers a small alternating current across the user's head via a pair of ear-clip electrodes. Reports by the manufacturer and its users generally state it to be effective as a way to assist with relaxation, stress reduction, sleep problems and mood problems.