Description: 100% quality Color: White Power supply mode: 1*AAA battery (not included) Feature: Using this product can stimulate the neurotransmitter of the cerebral cortex through micro current to regulate emotions, thereby promoting sleep. Using this product, the hands can be properly stimulated, so that the same hand and brain frequencies can be used to relieve anxiety. Small and convenient, you can take it with you. Suitable for people with insomnia, excessive thinking, etc. Package Included: 1 * Help sleep 1 *Chinese and English manual notes: prevention *Since the following population has not been specifically tested and the side effects of this product have not been observed, it is not clear whether it is harmful to the population. Based on the safety of patients, we do not recommend the following people to use this product: 1. Patients who use implanted electronic devices (such as pacemakers, insulin pumps) should use them with caution; 2. It is forbidden to use it with high-frequency equipment, short-wave or microwave processing equipment; 3. It is forbidden to use therapy electrodes near the chest, or to use therapy electrodes when operating complicated and dangerous equipment or driving; 4. It is strictly prohibited to use in patients with epilepsy; 5. Patients with recent hemorrhagic stroke should use it with caution. *For safety reasons, we recommend not to use sleep devices in the following situations: 1. When driving; 2. When operating complex and dangerous mechanical instruments. 3. Avoid long time. Strong current will stimulate the same position; 4. If you find skin burns, you can rest for a few minutes, and then move the electrode slightly to continue the treatment. 5. If the electrode is found to be severely burned to the skin, it should be stopped in time and used after expert treatment.