describe: Using this product can stimulate the neurotransmitters in the cerebral cortex to regulate mood through micro-current, thereby promoting sleep. Using this product, the opponent will be stimulated appropriately, so that the feeling of anxiety can be calmed down by the same frequency of the hand and the brain. Small and convenient, you can take it anywhere. Suitable for people with insomnia, thinking too much, etc. How to use: (You can also use the product image display method) 1. Place the front of the product completely on the palm of your hand. 2. Turn the top button from OFF to low-frequency decompression mode, which is recommended for left-handed people. 3. Press M again for high-frequency encouragement mode, which is recommended for right-hand use. 4. The power on the right increases and the power on the left decreases 5. Turn the top button OFF to turn off. Product material ABS + stainless steel Color/Style White/Orange/Blue Battery capacity 500mAh Packing quantity 60pcs Input voltage: DC 5V/1A Working power: 0.5W Charging Port: Micro USB Product accessories: host x1, USB data cable x1 Packing list: 1*Host x1, USB data cable x1 notes: 1. Due to manual measurement, there may be a slight error of 1-3cm. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.