Features:1. Ergonomic shape: Perfectly fits the human body, the palm fits perfectly, and can provide the best massage effect anytime, anywhere.2. Ultra-small and light: Easy to carry, powered by USB or 3 AAA batteries (not including batteries), it only takes 15 minutes a day to effectively tighten the skin.3. Health product: An ideal health product that can be used when sitting, standing or lying down, working, living and studying.4. Material: Made of sturdy ABS plastic, with rounded edges and smooth surface. A gift for yourself and your family.5. Applicable: Suitable for face, neck, arms, hands, waist, back, buttocks, legs, feet, etc.Specification:Rated input voltage: DC4.5V-DC5VRated power dissipation: 2.5WPower supply: AAA battery or USB cable or direct currentProduct size: 99*91*90mmPacking size: 100*96*96mmMassage method: VibrationPackage included: 1 x color box1 x massager1 x user manual1 x 1 meter USB cableHow to use: Hold the lower cover with your left hand, and turn the upper cover tightly with your right hand to the inside of it. You can open the top cover and install 3 AAA batteries. This product is not equipped with a switch, just press the massager to the position that needs to be massaged to start the massage.