Using this product can stimulate the neurotransmitter of the cerebral cortex through micro-current to regulate emotions, thereby promoting sleep.Using this product, the hand is properly stimulated, so that the feeling of anxiety can be calmed by the same frequency of the hand and brain.Small and convenient, you can carry it with you.Suitable for people with insomnia, overthinking, etc.How to use: (You can also use the product image display method) 1. Put the front of the product completely on the palm of your hand.2. Turning the top button away from OFF is the low-frequency decompression mode, which is recommended for left-handed use.3. Pressing M again is the high-frequency encouragement mode, which is recommended for the right hand.4. Power to the right increases, power to the left decreases5. Turn the top button to OFF to shut down. Product material ABS+stainless steelColor/style white/orange/blueBattery capacity 500mAhPacking quantity 60pcsInput voltage: DC 5V/1AWorking power: 0.5WCharging port: Micro USBProduct accessories: host x1, USB data cable x1Packing List:1* host x1, USB data cable x1Note:1. Due to manual measurement, there may be a slight tolerance of 1-3cm.2. Due to difference between different monitors, the picture may not reflect the actual color of the item.