Overview: 1. Round button design, one key to turn on, adjust power. Fall asleep easily every day USB charging is convenient, can be connected to the computer's USB port, mobile power, power supply, and other charging methods, and the battery life is long. 2. The use of this product can stimulate the neurotransmitter of the cerebral cortex through microcurrent to regulate emotions, thereby promoting sleep. 3. Using this product, the hands can be properly stimulated, so that the same hand and brain frequencies can be used to relieve anxiety. 4. Small and convenient, you can take it with you. 5. Suitable for people with insomnia, overthinking, etc. Specification: Product material: ABS + stainless steel Battery capacity: 500mah Input voltage: DC 5V / 1A Working power: 0.5W Micro: USB charging interface