... Frequency Machine,RF Skin Tightening MachineTheory of Monopolar RF MachineMonopolar RF takes that epidermis balances normal temperature, RF electric waveproduces ... based on assurement of skincomfortable, harmless, it uses RF electric wave to produce heat exchange, precisely attainsskin ... ,recover skin elasticity and luster. Features of Monopolar RF Machine1. Rolling Electrode Type and oriented Pad Type ...