Specifications: Dimensions: Height: 170mm/6.69in, Length: 41mm/1.61in, Width: 31mm/1.22in, Massage head length: 54mm/2.12in Rated input: AC 100V-240V, 50/60Hz Output voltage/current: DC 5V/1A Rated voltage/rated capacity: 3.7V/500mAH Rated power: 4W Modes: Four modes Charging time: about 3 hours (charging status: charging shows a red light, full shows a white light) Intensity gear: 3 gears Packing list: 1 * Retail box 1 * Host 1 * Manual 1 * USB charging cable Features: 1. [Positive and negative ions] Using the principle of mutual attraction between positive and negative ions, the deep dirt in the pores is discharged through bioelectric current for thorough cleaning. Tighten the skin through iontophoresis. 2. [Vibration] Use mechanical vibration and voltage stimulation to tighten human skin, increase elasticity, and enhance the metabolism of skin cells. 3. [Warmth] Warmth massage promotes absorption, stretches skin texture and plumps skin. 4. [Red and blue light function] 5. [4 modes] Skin tightening, skin brightening, anti-wrinkle, wrinkle removal, facial removal, cleansing and detoxification.