4 in 1 ultrasound device. This is a beautiful beauty machine combining 4 functions of ultrasonic massage (1M, 3M), photon, ion import/export to improve skin structure, skin tightening, facial lifting, pore shrinking and elimination of bags and dark rings. Ultrasonic: this machine uses 1M and 3M ultrasonic double probes that are used 1 million times and 3 million times per second separately to produce high frequency oscillations that penetrate ultrasonically, which acts on the human body to absorb sound energy in heat. Skin cells. It promotes blood circulation and the metabolism, improves the absorption of nutrients and activates the body's defences. Photon - red light: It can reach the dermis layer to stimulate fibre cells, improve blood circulation, activate the skin, reduce wrinkles and smooth the skin. Green light: It can promote oxygen exchange micro-circulation, diluting pigment and whitening. Blue light: It can kill bacteria, calm and fight rashes and acne, strengthen protein fibre organisation, and shrink pores. Functions: clean the skin deeply, eliminate wrinkles, smooth skin, whiten and tighten the skin, dilute marks, dark circles, eye bags, reduce grease, shape slim facial contours, and promote blood circulation and the metabolism. Positive and negative ion: the positive ion removes deep dirt in pores and cleans the skin deeply, smoothing and building the skin. The negative ions import nutrients from skin care products deep into the skin to effectively absorb nutrients.