Feature: 1. 1. The product adopts a simple oval design with a new matte texture, which matches the design of people's hands, simple and comfortable. 2. 2. Round button design, one key to turn on, adjust the power supply. Fall asleep easily every day. 3. 3. 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. 4. 4. Using this product, the neurotransmitter of the cerebral cortex can be stimulated by microcurrent to regulate emotions, thereby promoting sleep. 5. 5. Using this product, the hands can be properly stimulated, so that the same hand and brain frequency can be used to reduce anxiety. Small and convenient, you can take it with you. Suitable for people with insomnia, excessive thinking, etc. 6. Specification: Product name: Spring sleep aid Product model: M002 Product material: ABS+stainless steel Product size: 38.5*40.5*68.5mm Product packaging: 68.5*70*100mm Product net weight/gross weight: 38g/135g Battery capacity: 500mAh Color/style optional: white/orange/blue Input voltage: DC 5V/1A Working power: 0.5W Working current: 1.5-2A Charging time: 1.5H Timing function: automatic shutdown for 20 minutes at a time, about 50 times of use Charging time: 2H Charging port: Micro USB Button control method: button Package List: host x 1, USB data cable x 1, Chinese and English user manual x 1, certificate x 1 Usage: (You can also use the product picture display method) 1. Place the front of the product completely on the palm. 2. Turning the top button from OFF to OFF is the low-frequency decompression mode. It is recommended to use it with the left hand. 3. Press M again for high frequency excitation mode, recommended for right hand. 4. The power on the right increases and the power on the left decreases 5. Turn the top button to OFF to turn off. 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.