working principle:spot remover beauty equipment 202 applies high frequency coagulating current, which can spur epidermal cell necrosis and wipe out various spots on face and skin surface in an instant operation (1) sterilization: sterilize the needle with 75% alcohol. (2) connect the spot remove pen to the machine. insert the plug. (3) switch on the knob, adjust intensity. (4) hold the spot removal pen firmly to touch on the pigment/naevi. you will see the melamine decomposing.(5) rub some antiphlogistin on it till decrustation personal spot remover facial beauty machine with a "magic pen", help you remove spots & pigments...find the original of yourself..syi