1. Portable & handy design and knob design make it easy to operate; 2. Voice signal ensure clear prompt and guidance for patients; 3. Large clear LCD screen can display the RMS value histogram; 4. 4 types stimulation modes , Combination of passive & active training for a better treatment; 5. 2 channel can work separately for 2 groups of muscles or 2 patients; 6. Completely free to check the real-time electricity size during the treatment; 7. Customized Plan: Set parameter freely to meet different situations.