1.3 IN 1 Multi-Functional Machine The working principle of this device is constant temperature, E-M-S function and red-light technology, doesn't have the strong vibration, it just can just vibrate very slightly. This decive will improve skin problems and beautify your skin, it can be used on different body parts such as arm, leg, face, waist, belly and hip. 2.Constant Temperature TechnologyTurn this machine on, your skin could feel warm by 2 to 3 minutes, because of the constant temperature (98-107) function, a little higher than body temperature, it will increases the temperature of the active part and temperature inside the skin, and improves the effect of other technologies. 3.E-M-S FunctionFive different E-M-S modes, you can choose the appropriate mode according to your needs or the part of use. 4.Red-Light TechnologyPromote blood circulation, leaving you a vibrant, glowing skin and make the skin tighter and smoother. 5.Notice1. For optimal result, please use skin care gel, cream or essential oil to the required area before use. 2. Don't recommended to continuously use for over 15 minutes in the same area. 3. please use consistenly for 3 months, you will find the unexpected effects.