1.4D sonic vibration, silica gel brush head + dupont antibacterial double tip. 2.brush head, cleaning makeup and pores. 3.Three kinds of working gear, with professional custom brush/silica gel brush head, suitable for all kinds of skin use. 4.Brush tip diameter 0.02mm. 5.With smart partition alert, voice alerts. 6.The IPX5 waterproof. 7.Magnetic suction type USB charging, waterproof design. 8.Acoustic motor, magnetic levitation design, small internal friction.