Ultrasonic Massager: • Acoustic Vibration Beauty Principle: Microsonic vibration technology cleanses your skin up to 8,200 times per minute. High frequency vibration to deeply cleanse every pore. •Hot and cold beauty principle: When the skin reaches 42°C, it helps produce HSP proteins, repair skin cells, strengthen skin elasticity, and prevent wrinkles. While the cold can instantly close the pores of thin skin, it can lock in moisture in the deep skin. •Temperature range from 6°C to 42°C. The skin becomes soft and full of elasticity, restoring skin firmness. It helps stimulate blood circulation and accelerate the skin's metabolism; the acoustic vibration also promotes a calming effect. •Cooling effect: helps firm the skin, maintain flexibility, prevent allergies and other problems. Shrinks pores, locks in moisture and reduces wrinkles. It can calm muscles, relieve skin fatigue, soothe the feeling of skin tension, reduce skin redness, pain, resistance to repeated acne growth. •Warm effect: helps relax muscles and relieve pain. It stimulates the acceleration of blood circulation, so with open pores, it helps the skin quickly absorb all types of skin care products, making the skin more elastic and moisturized. •LED Photon Beauty Principle: Red light with wavelength of 620nm (±10nm), 18 LEDs penetrate deep into the skin to promote blood circulation and collagen regeneration, improve skin elasticity, and make the skin smooth. Suitable for sagging and wrinkled skin. Blue light with wavelength of 470nm (±10nm), 18LEDs penetrate deep into the skin to kill bacteria, promote blood circulation. It can penetrate 0.25mm into the skin to destroy the living environment of bacteria, with anti-inflammatory, bactericidal effects, removing acne, acne scars effectively. •Includes USB charging cable. Input: DC5V 220V Charging: USB, with charging cable included. Power: max 2.5W Battery: 1000mAh Temperature range: 6–42°C (±3°C) Charging time: 5-6 hours ABS, metal alloy.