Brand New and High Quality Type: Holding Sleep Instrument Material: ABS+Stainless Steel 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 Color: Grey, Blue, Yellow Size: 25 x 32 x 70mm Package Include: 1 x Host 1 x USB data cable 1 x Silicone case 1 x Manual Features: 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. 6. Light weight and in small size, easy to carry when going out. Suitable for patients with insomnia and anxiety. Tips: 1.Due to the light and monitors effect, colors may have lightly difference. 2.Please allow slightly size errors due to manual measurement.Thank for your understanding.