This is a multi-functional beauty device that performs five functions in one, including cleansing to remove pore dirt and blackheads, and introducing beauty ingredients. It features five functions: ultrasonic esthetics, iontophoresis, ion extraction (cleansing), vibration massage, and three-color LED photofacial (light esthetics). It is rechargeable. The basic usage is to apply serum after washing your face and gently glide the device from the bottom up and outwards, switching between each function (iontophoresis, ultrasonic, LED). Use it about 2-3 times a week to remove pore dirt that can't be removed by hand and allow beauty ingredients to penetrate deeply, aiming to tighten the skin. ◯ Set Contents: belulu classy body USB adapter USB cable Instruction manual with warranty Cotton fixing ring I am selling this because I no longer use it. The operation has been tested, and charging is not a problem. There are no scratches, but it has been used normally, so please refrain from purchasing if you are concerned.