Features: Sleep Aid Instrument: Helps individuals with insufficient sleep, migraine, anxiety, or stress to fall asleep. Compact design with powerful performance for easier entry into deep sleep. Working Principle: Uses microcurrent to stimulate neurotransmitters in the cerebral cortex to regulate mood, calm the mind, relax the body, and promote sleep. Operating Modes: Low-frequency relaxation mode to improve insomnia and high-frequency exciting mode to aid concentration. Press the power button to adjust the mode and use the +/- buttons to change intensity. Compact and Portable: Lightweight and portable with a silicone anti-drop strap for easy attachment to the wrist. Suitable for use in the office, at home, or while traveling. Ideal Gift: Use during the day to improve focus on important tasks and complete work effectively. Use at night to relieve anxiety and stress and improve insomnia. A thoughtful gift for yourself, family, friends, or colleagues. Specifications: Input Voltage: DC 5V/1A Working Power: 0.5W Battery Capacity: 500mAh Usage Time: Fixed 20-minute automatic shutdown, approximately 50 uses per charge Charging Time: 1.5H Charging Interface: Micro USB Material: ABS and Stainless Steel Color: Gray, Orange, Blue (Optional) Item Size: 70 x 32 x 25mm / 2.75 x 1.26 x 0.98in Item Weight: 44g / 1.55oz Package Size: 120 x 78 x 58mm / 4.72 x 3.07 x 2.28in Package Weight: 144g / 5.08oz Package List: 1 x Sleep Aid Device 1 x Charging Cable 1 x User Manual (English and Chinese)