Features: Sleep Aid Instrument: It can help people with insufficient sleep, migraine, anxiety, or stress to fall asleep as soon as possible, small body but powerful, easier to enter deep sleep every day. Working Principle: Uses microcurrent to stimulate neurotransmitters in the cerebral cortex to regulate mood, calm down mind to relax the body, and thus promote sleep. 2 Operating Modes: Low-frequency relaxation mode (to improve insomnia) and high-frequency exciting mode (to concentrate), just press the power button to adjust the mode, press to increase or decrease the intensity. Compact and Portable: Lightweight and portable, with silicone anti-drop strap, easy to hang from the wrist. It can be used in the office, at home and on business trips. Best Gift: Use it during the day to focus more on important things and complete your work effectively use it at night to relieve anxiety and stress, improve insomnia. This is the best gift for yourself, your family, friends and colleagues. Specifications: Input Voltage: DC 5V or 1A Working Power: 0.5W Battery Capacity: 500mAh Usage Time: Fixed 20 minutes automatic shutdown, can be used for about 50 times Charging Time: 1.5H Charging Interface: MicroUSB Material: ABSandStainless steel Color: Gray, Orange, Blue (Optional) Item Size: 70x32x25mm or 2.75x1.26x0.98in Item Weight: 44g or 1.55oz Package Size: 120x78x58mm or 4.72x3.07x2.28in Package Weight: 144g or 5.08oz Package List: 1 x Sleep Aid Device 1 x Charging Cable 1 x User Manual (English or Chinese)