Feature: 1. Simple oval design, new matte texture, in line with human hand grip design, simple and comfortable. 2. Round button design, one key to turn on, adjust power. Easy to fall asleep every day. 3. USB convenient charging, can be connected to a computer USB port, power bank, power supply, etc., long endurance. 4. It can stimulate neurotransmitters in the cerebral cortex through microcurrents, regulate emotions, and promote sleep. 5. When using this product, properly stimulate the hands, so that the hands and brain will be at the same frequency to calm the anxiety. Specification: Condition: 100% Brand New Item Type: Holding Sleep Instrument Material: ABS Mode: Sleep Aid / Inspiration Power Supply Mode: USB Charging Battery Capacity: 500mAh Input Voltage: DC 5V/1A Working Power: 0.5w Endurance Time: 20 Hours Suggested Use Time: 15 Minutes How to Use: To put the front of the product completely in your hand: Press the power button is the low-frequency decompression mode, which is recommended for left hand. Pressing the power button again is the high-frequency encouragement mode, which is recommended for the right hand. Adjust power with +/- keys on both sides Long press the power button to shut down. Package List: 1 x Host 1 x Manual 1 x USB Cable Note: We do not recommend the following people to use this product: 1.Patients who use implanted electronic devices (such as pacemakers, insulin pumps) should be prohibited from using it; 2. It is forbidden to use it with high-frequency equipment, shortwave or microwave treatment equipment at the same time; 3. It is forbidden to use treatment electrodes near the chest or use it when operating complex and dangerous equipment or driving; 4.USB convenient charging, can be connected to a computer USB port, power bank, power supply, etc., long endurance. Simple oval design, new matte texture, in line with human hand grip design, simple and comfortable. When using this product, properly stimulate the hands, so that the hands and brain will be at the same frequency to calm the anxiety. Round button design, one key to turn on, adjust power. Easy to fall asleep every day. It can stimulate neurotransmitters in the cerebral cortex through microcurrents, regulate emotions, and promote sleep.Model Name: DONN. Material: Acrylonitrile Butadiene Styrene (ABS). Brand: Donn. Color: Blue. Power Source: Battery Powered. Material Type: Acrylonitrile Butadiene Styrene (ABS). Connector Type: USB. Color Name: Blue. Date First Available: October 27, 2021. Best Sellers Rank: #588,261 in Health & Household (See Top 100 in Health & Household) #2,877 in Sleep Masks. Item model number: DONNdxgvfaneob4703-12. : B09KH6XKTT. Package Dimensions: 4.72 x 3.15 x 2.36 inches. Item Weight: 5 ounces.