... apply the skin products, suggest use vacuum RF roller with ultrasonic fat burning gel ,RF is suitable for body,abdomen,arm,leg ... ,back,buttocks.3).Use 40Khz Ultrasonic cavitation system, thought the fat layer by strong waves, speed vibration deep stubborn ... time[Start/Pause] mark start and pause 3). 40KHZ Ultrasonic Cavitation System A. According to the client's physical condition ...