... 3. High potential 4. Magnetic field . wellness physiotherapy device MG119 Product Features1, adopt micro controller to control, stable ... performance, low failure rate. 2, high-voltage generating device is manufactured by adopting special techniques, which improve the ... grade:20KV,medium-grade:15KV,low-grade:9KV,( ± 20%)Automatic adjustmenthigh-grade, medium-grade and low grade, circulation frequency ...