... drainage,skin tightening 4.40KHZ Ultrasonic WY-B32 tripolar radio frequency/cavitation machine I Theory:The Cavitation&Vacuum ---slimming, body ... granuleThe RF ---skin tightening, skin lifting, wrinkle removal: High frequency wave permeates epidemis and take effect on the collagen-rich ... ,000 times per second. To reply to the rapid change in electrode, directions of electrical particles the skin are ...