Sleep Aid Handheld Microcurrent Smart Anxiety and Depression Relief Rapid Sleep Instrument  Sleeping aid parameters: Body material: ABS Power supply voltage: DC5V~3.7A Charging interface: USB Adjusting gear: 15 gear force Battery capacity: 300 mA Control mode: key+rotary key control Operating temperature: 0-40 ° c Feature: 1. Using this product can stimulate neurotransmitters in the cerebral cortex through micro currents, thereby regulating emotions and promoting sleep. 2. Small and convenient, you can carry it with you. 3. The battery capacity is 300mAh, USB is convenient for charging, it can be connected to the computer's USB port, mobile power, power supply and other charging methods. 4.. Suitable for people with insomnia, overthinking, etc. Package Included: 1* Sleep Aids CES Insomnia Device 1* USB Cable 1* User Manual How to use: (You can also use the product image display method) Put the front of the product completely on the palm of your hand. Turning the top button away from OFF is the low-frequency decompression mode, which is recommended for left-handed use. Pressing M again is the high-frequency encouragement mode, which is recommended for the right hand. Power to the right increases, power to the left decreases Turn the top button to OFF to shut down.